1) A firm's balance sheets showed that its accounts receivable was $134 at the beginning of the year and $361 at the end of the year. Its income statement showed that its sales were $2,350 and its cost of goods sold was $1,475. Find the firm's accounts receivable period.

2) A credit card uses weekly compounding and charges 0.5% per week. Assume that there are 52 weeks in a year. Find the effective annual rate on the credit card.