Answer:
$15,000
Explanation:
Let the monthly sales = x
We write an expression for each choice. Then we set the choices equal and sole for x.
"monthly salary of $750 plus a bonus of 25% of her monthly sales"
0.25x + 750
"$3000 monthly salary with a 10% bonus on sales"
0.1x + 3000
Set the choice equal:
0.25x + 750 = 0.1x + 3000
0.15x = 2250
x = 2250/0.15
x = 15,000
Answer: $15,000