An FI offers a $2,500 minimum balance NOW account paying 4 percent annual interest, and there are no service charges as long as the customer maintains the minimum balance. The customer maintains a balance of $5,000, and averages 750 checks per year. Each check has a processing cost to the FI of $0.15. What is the annual gross interest return on this account to the customer?

A DI offers a $500 minimum balance NOW account paying 5.5 percent annual interest. The account has a service charge of $0.05 per check, and processing costs per check are $0.15. The customer maintains a balance of $1,000, and averages 150 checks per year. What is the annual gross interest return on this account to the customer?