20-2: Yue Yeung Industries has sales of $10,000 in May, $20,000 in June, and $30,000 in July. The company collects 25% of sales in the month of sale, and the remaining 75% in the following month. Calculate Accounts Receivable at June 30.

20-3: A merchandising company expects to sell 300 units in April, 400 units in May, and 500 units in June. The company plans to have 30% of each months sales, plus an additional 50 units, on hand in inventory at the beginning of each month. How many units should the company plan to purchase in May?