Final answer:
The correction for the missed transaction will c. decrease both the cost of sales and the gross profit by £1,800.
Step-by-step explanation:
As a sole trader, Afia's personal use of goods is considered a private expense and should not be included in the calculation of her business's profit figure. Therefore, the correction for the missed transaction will result in a decrease in both the cost of sales and the gross profit.
The correction for the missed transaction will have an impact on both the cost of sales and the gross profit. In this case, afia took goods costing £1,800 for her own use, but the cost of these goods was not recorded in arriving at her draft profit figure. To correct for this, the cost of sales should decrease by £1,800 and the gross profit should also decrease by the same amount.