Shop prices and GST

Commission Commission is a payment based on a stated rule, often a percentage of the value sold. The sales value is the base, and a fixed salary is separate from the commission. Example A salesperson receives a fixed $500 plus 4% of $2500 in sales. The commission is 0.04 x $2500=$100, so the total earnings are $600. If only total earnings are given, subtract the fixed pay first. Then divide the commission by its nonzero rate to recover sales. For a rule with bands, calculate each band separately before adding. Check whether the question asks for commission alone or total earnings. A salary should be added only when the rule provides one.

Commission is a payment based on a stated rule, often a percentage of the value sold. The sales value is the base, and a fixed salary is separate from the commission.

A salesperson receives a fixed $\$500$ plus 4% of $\$2500$ in sales. The commission is $0.04\times\$2500=\$100$, so the total earnings are $\$600$.

If only total earnings are given, subtract the fixed pay first. Then divide the commission by its nonzero rate to recover sales. For a rule with bands, calculate each band separately before adding.

Check whether the question asks for commission alone or total earnings. A salary should be added only when the rule provides one.