Determine the material usage variance.

Here are the answers to your questions:

47. Determine the material usage variance.
The necessary information (standard quantity, actual quantity, standard price) to calculate the material usage variance is not provided in the question. Therefore, this question cannot be answered.

48. In the interlocking system of accounting

• B. cost and financial accounts are kept together.
  • Explanation: In an interlocking (or integrated) system of accounting, cost and financial accounts are maintained within a single, unified set of books, ensuring that they are kept together and are self-balancing.

49. Transfer of cost of sales is found at the credit side of

• C. Finished Goods Ledger Control Account.
  • Explanation: When goods are sold, their cost is transferred out of the Finished Goods inventory. This is recorded by crediting the Finished Goods Ledger Control Account and debiting the Cost of Sales Account.

50. Separate books are kept for cost and financial accounting in

• B. interlocking accounts.
  • Explanation: An interlocking accounting system is characterized by maintaining separate ledgers for cost accounting and financial accounting, which are then linked or "interlocked" through control accounts (e.g., Cost Ledger Control Account in the financial ledger and General Ledger Adjustment Account in the cost ledger).