Sarah has a bakery business where she sells cakes, cookies, and bread. Last month, she earned $5,000 from selling her baked goods. She spent $2,000 on ingredients, $1,000 on rent, and $500 on electricity bills. She owes $1,000 to a supplier for the ingredients she bought. She buy baking equipment worth $4,000, a delivery van worth $10,000, and cash in the bank worth $2,500.
What is Sarah's revenue for last month?