Of the following, which is not a legitimate method of inventory costing?

A company buys 100 units of inventory for $20 each. Later, 90 of these units are sold on credit for $50 each. The company then buys an additional 40 units but the cost has risen to $22 each. The company sells a final 30 units for $55 each. The company uses a moving average system for calculating its cost of goods sold. What should be reported as the cost of the 120 units sold during the year?

A company counts its inventory and arrives at a total of $167,000. The company fears that some merchandise has been stolen and seeks to estimate the amount of the loss. Sales for the period were $600,000. Gross profit is set by the company at a standard 40% of the sales price. According to ledger balances, inventory on the first day of the year was $150,000 and purchases of $390,000 were made during the period. How much theft has occurred?

A company has two pieces of Inventory, A and B. Inventory A cost the company $40 per unit and can now be sold for $60 per unit after incurring $15 in selling expenses per unit. It has a replacement cost of $35 per unit and a normal profit of $4 per unit. Inventory B cost the company $52 per unit and can now be sold for $63 per unit after incurring $15 in selling expenses per unit. It has a replacement cost of $55 per unit and a normal profit of $4 per unit. If the company uses the retail method to value its inventory, how much should be reported on the balance sheet for these items?