Q.An agent sells goods worth ₹75,000 on behalf of his principal and is paid commission at the rate of 4%. Find the commission the agent earns.

Total sales $= \frac{58500}{0.125} = ₹4{,}68{,}000$; number of computers $= \frac{4{,}68{,}000}{18{,}000} = 26$.

Commission is $12.5\%$ of total sales. If $S$ is the total sales value,

$\text{Commission} = 12.5\% \text{ of } S \;\Rightarrow\; 58{,}500 = \frac{12.5}{100}\,S = 0.125\,S.$

Solve for $S$:

$S = \frac{58{,}500}{0.125} = ₹\,4{,}68{,}000.$

Each computer costs ₹$18{,}000$, so the number of computers sold is

$\frac{4{,}68{,}000}{18{,}000} = 26.$