Retail Inventory-Level Planning consists of retail inventory method (RIM) which is an accounting procedure whose objectives are to maintain a perpetual. It also can book inventory in retail dollars amounts and maintain records that make it possible to determine the cost value of the inventory at any time without taking a physical inventory.
Also known as book inventory system or perpetual book inventory. Retailers also have another important choice to make the stock to sales ratio. The stock to sales ratio is derived directly from the planned inventory to determine monthly additions to stock in the merchandise budget plan.
Retailers generally think of their inventory at retail price levels rather than at cost. Retailers use their initial markups, additional markups, and markdowns, and so forth as percentages of retail. When retailers compare their prices to competitors’, they use retail prices.
The problem is that when retailers to design their financial plans, evaluate performance, and prepare financial statements, they need to know the cost value of their inventory. Retailers use physical inventories. This process is time-consuming and costly. Retailers take physical inventories once or twice a year.
Many retailers use point of sale terminals that keep track of every item sold its original cost and its final selling price. The rest of the retailers face the problem of not knowing the cost value of their inventory at one time. These retailers with either computerized or manual systems can use the retail inventory method.
There are five advantages of using RIM over a system of inventory at cost. The does not have to “cost” each time. When retailers have many SKUs, keeping track of each item becomes difficult and expensive. It is easier to determine the value of inventory with the retail prices marked on the merchandise than unmarked or at coded cost prices.
The second advantage of using RIM is that it follows the accepted accounting principle of valuing assets at cost or market value, which is lower. This system lowers the value of inventory when markdowns are taken but does not allow inventory’s value increase with additional markups.
When using RIM, the amounts and percentages of initial markups, markdowns, and shrinkage can be identified. This information can then be compared with historical records or industry norms.
RIM is useful for determining shrinkage. The difference between the book inventory and the physical inventory can be attributed to shrinkage.
The book inventory determined by RIM can be used in an insurance claim in case of a loss.
The disadvantages of RIM are a system that uses average markup. When markup percentages change during a period or when the inventory on hand at a particular time is not representative of the total goods handled in terms of markup, the resulting cost may be distorted. The inventory turnover, merchandise budget planning, open to buy, all these should be applied to the RIM category basis to avoid the problem.
There are four steps in when calculating RIM. Calculate total goods handled at cost and retail, calculate retail reductions, calculate the cumulative markup and cost multiplier, and determine ending book inventory.
Calculating the total goods handled in at cost and retail to determine the total goods handled at cost and retail:
1. Record beginning inventory at cost and at retail. The initial markup is reflected in the retail inventory.
2. Calculate net purchases by recording gross purchases and adjusting for merchandise returned to the vendor.
3. Calculate net additional markups by adjusting gross additional markup cancellations. Note: These are recorded only at retail because markups affect only the retail value of inventory.
4. Record transportation expenses. Here transportation is recorded at cost because it affects only the cost of the inventory.
5. Calculate net transfers by recording the transfers in and out. A transfer can be from one department to another or from one store to the next. Transfers are generally made to help adjust inventory to fit demand. A transfer is, in effect, just like a purchase (transfer-in) or a return (transfer out). Thus, it is recorded at both cost and retail.
6. The sum is the total goods handled.
Calculating retail reductions are the transactions that reduce the value inventory at retail (except additional markup cancellations, which were included as part of the total goods handled). Reductions are calculated as follows:
1. The largest reduction in inventory is sales. Gross sales are reduced to net sales by deducting customer returns and allowances.
2. Calculate markdowns, are derived by subtracting any markdowns from gross markdowns.
3. Record discounts to employees and customers.
4. Record estimated shrinkage is used to determine the ending book inventory if the buyer has prepared an interim financial statement. Estimate shrinkage would not be included if a physical inventory were taken at the same time. The difference between physical inventory and book inventory would be the amount due to loss.
5. The sum is the total reductions.
Next, a retailer has to calculate the cumulative markup and the cost multiplier. The cumulative markup is the average percentage markup for the period. It is calculated like this:
Total retail- total cost
Cumulative markup total retail
The cumulative markup can be used as a measuring stick against the planned initial markup. If the cumulative markup is higher than the planned initial markup, then the
The category is doing better than expected.
Cost multiplier =($100-cumulative markup %)
The cost multiplier is used in the next step to determine the ending book inventory at retail price.
The final step in the process is determining the ending book inventory at cost and retail.
Ending book inventory at retail = total goods handled at retail – total reductions
The ending book inventory at cost is determined the same way that retail has changed to cost.
Ending book inventory at cost = ending book inventory at retail * cost multiplier
When using the RIM retailers generally use the average beginning of month (BOM) stock to sales ratio. This is taken from the planned inventory which was taken from the RIM. This is used to determine monthly additions to stock in the merchandise budget plan. The BOM is broken down into three different methods week’s supply method, basic stock method, and percentage variation method.
The week’s supply method is the inventory management method is the most similar to the stock to sales method. The difference between the two is that everything is expressed in weeks rather than months. The average BOM stock to sales ratio is equal to months in the period divided by the planned inventory for the period. “If the plan is for 12 months and planned turnover is 6, the average BOM stock to sales ratio = 12/6=2.
Using the week’s supply method, 52 weeks are substituted for 12 months. Thus, 52 weeks / 6 turns =8.66 weeks of supply. This means the buyer is planning to have 8.66 weeks of supply at the beginning of the month. (Of course, 8.66 weeks is equivalent to two months.)”
The basic stock method is the inventory management method used to determine the BOM inventory by considering both the sales forecast for the month and the back-up stock.
BOM inventory Forecast monthly sales + Basic stock
Basic stock and back-up stock are the same thing. The basic stock method uses inventory turnover to calculate BOM inventory.
1. Given the monthly sales, the average sales for the period is $16,666 (total period sales/number of months).
2. Assuming inventory turnover for three month period is 2 (eight annual turns), average inventory for the period is $25,000.
Average inventory Total period sales/Inventory turnover
3. Basic stock Average inventory- Average sales
$8,334= $25,000 -$16,666
4. BOM inventory for October = Basic stock + Planned sales for October
$23,334 = $8,334 + $15,000
The basic stock method is not effective if the inventory turnover is greater than 12 times a year. That is when the average inventory would be less than average monthly sales, causing the basic stock to be negative. In this case, the stock to sales method and the monthly stock to sales ratio are utilized because these ratios fluctuate with the forecast level of sales. This makes more sense for months with higher sales when there is a greater need for back up stock.
Percentage Variation Method considers the same factors as the basic stock method. The formula is expressed like this:
BOM inventory = Average * 1/2(1+planned sales for the month/average monthly sales)
The percentage variation gives the same results as a basic method when the annual inventory turnover of 6 is planned. When higher inventory turnovers are planned, the percentage variation has the same shortcomings as the basic stock method.
In conclusion, both of these methods are used by retailers to measure how to plan their retail inventory. Planning retail inventory is essential for the business to run smoothly and continue to prosper. All retailers need this skill to keep track of their inventory whether it is using POS terminals or utilizing the retail inventory method.
Appendix 13a; Retail Inventory Method p 396-398: Retail Management
Appendix 13b; Alternatives to Stock to Sales Ratio P 399-401: Retail Management
www.harvarduniversity.edu Business Resources (Retailing)
www.askjeeves.com (Steps of Retail Inventory Method)
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