Math CentralQuandaries & Queries


Question from Tamara:

if you earned a gross wage of $810, which includes a salary of $90 and a 6% commission how much is the net sales?

Hi Tamara,

Since you were paid a salary of $\$90$ your commission was $\$810 - \$90 = \$720.$

Your commission is 6% of sales so if you knew your sales you could calculate your commission. For example if your sales were $\$2000$ then your commission would be

\[0.06 \times \$2000 = \$120.\]

But you don't know your sales so let's assume it is $\$S.$ Then

\[0.06 \times \$S = \$720.\]

Solve for $\$S.$


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