Given:
The percentage rate of commission, R=3%.
The commission recieved by Melanie, C=$8571.
The expression for commission amount is,
[tex]C=\frac{R}{100}\times SP[/tex]Here, SP is the sale price of the house.
Put R=3% and C=$8571 in the above equation to find sale price.
[tex]\begin{gathered} 8571=\frac{3}{100}\times SP \\ SP=\frac{8571\times100}{3} \\ SP=285700 \end{gathered}[/tex]Therefore, the sale price is $285700.