Rick Morrow is willing to lend modest amounts of money to his employees for short terms at 9% ordinary simple interest (360-day year). In May, one employee borrowed some money for 30 days. In June, she repaid the loan plus $6.30 interest. Compute the amount that the employee had borrowed.

Ordinary Simple Interest

Interest calculated on the principal amount only, without compounding, usually over a period of a year or less.

360-Day Year

A financial convention or calculation basis where the year is assumed to consist of 360 days rather than 365 or 366 days, often used in interest rate calculations.