Willy used to work as a high school teacher for $40,000 per year but quit in order to start his own painting business. To invest in his painting business, he withdrew $20,000 from his savings, which paid 3 percent interest, and borrowed $30,000 from his uncle, whom he pays 3 percent interest per year. Last year Willy paid $25,000 for supplies and had revenue of $60,000. Willy asked Tim the accountant and Gilbert the economist to calculate his painting business's costs.