Answer: her profit was $13
Step-by-step explanation:
She spent 5 dollars on supplies. If she sold 9 before running out of supplies, it means that the number of supplies that she had was 9 and the 9 supplies cost her $5.
She sold each supply for $2. It means that the revenue that she generated from selling 9 supplies is
9 × 2 = $18
Profit = revenue - cost
Therefore, the amount of profit that she earned is
18 - 5 = $13