If the deed provides interest on monthly drawings, why is the average period considered?

Correct answer: Because drawings occur at different times

Direct answer: Option A, because drawings occur at different times. Interest depends on three things: amount, rate and time. Monthly drawings are not normally made on one single date. A drawing made early remains out of the firm’s use for longer, while a late drawing remains out for less time. Therefore an average period is used when the question permits a simplified calculation. Step by step: list or understand the monthly withdrawals; recognise their different dates; determine the applicable average period; use the formula \\(\text{Interest}=\text{Drawings}\times\text{Rate}\times\text{Time}\\) when appropriate. Option A is correct. Option B is wrong because equal profit does not determine drawing time. Option C is wrong because capital may or may not change and is not the reason for average period. Option D is wrong because bank interest policy is irrelevant. Remember: earlier drawings usually attract interest for longer.