Answer:
$7500
Step-by-step explanation:
Let's say she sells x dollars in terms of goal sales
base salary + goal commission = goal total salary
1000 + goal commission = 2500
1000 + 20% commission of total goal sales = 2500
1000 + 20% of x = 2500
1000 + 0.2x = 2500
subtract 1000 from both sides to isolate x and its coefficient
0.2x = 1500
multiply both sides by 5 to find x
x = 7500