Start with the net profit calculated by the bookkeeper.

The bookkeeper calculated the net profit to be R420 000.

$$\text{Net Profit (initial)} = \text{R}420\,000$$

Interest on fixed deposit is an income that was not recorded. It increases the net profit.

$$\text{Net Profit} = \text{R}420\,000 + \text{R}800 = \text{R}420\,800$$

Bank charges are an expense that was not recorded. It decreases the net profit.

$$\text{Net Profit} = \text{R}420\,800 - \text{R}1\,300 = \text{R}419\,500$$

The equipment cost is R150 000 and accumulated depreciation as of 01 March 2020 is R65 000. Depreciation is calculated at 10% on the diminishing balance method. The financial year ends on 28 February 2021.

$$\text{Carrying Value (01 March 2020)} = \text{R}150\,000 - \text{R}65\,000 = \text{R}85\,000$$ $$\text{Depreciation for the year} = 10\% \times \text{R}85\,000 = \text{R}8\,500$$

Depreciation is an expense that was not recorded. It decreases the net profit.

$$\text{Net Profit} = \text{R}419\,500 - \text{R}8\,500 = \text{R}411\,000$$

When a partner takes trading stock for personal use, the cost price of the stock is removed from the cost of sales and charged to drawings. This means the cost of sales was overstated, so the net profit needs to be increased by the cost price of the stock.

$$\text{Cost price of trading stock taken} = \text{R}1\,800$$ $$\text{Net Profit} = \text{R}411\,000 + \text{R}1\,800 = \text{R}412\,800$$

The adjusted net profit is:

$$\text{R}412\,800$$