



 
Hi Tashana, You can use the information in your problem to create an equation. The selling price is the sum of the cost and the profit. You don't know the cost so I am going to call it $\$C.$ The profit is 20% of the cost so the profit is $0.20 \times \$C.$ The equation is then that $\$320$ is the sum of $\$C$ and $0.20 \times \$C.$ Solve for $\$C.$ Penny  


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 