



 
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 $\$S.$ Penny  


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