contestada

Joan works on commission for a furniture store. She gets a base pay of $85 a day plus 6 percent of the
value of any merchandise she sells that exceeds a total of $400. Joan wrote the expression 400+ 0.06(t -
85), where t represents her sales total in dollars, to compute the total amount of money that she will
make. For sales of $500 Joan calculated that she will make $424.90. Explain Joan's error by completing the
correct expression and how much she will make.