(Efficiency analysis) The Brenmar Sales Company had a gross profit margin (gross profits sales) of 25 percent and sales of $9.5 million last year. 79 percent of the firm's sales are on credit, and the remainder are cash sales. Brenmar's current assets equal $1.5 million, its current liabilities equal $302,200, and it has $106,800 in cash plus marketable securities. a. If Brenmar's accounts receivable equal $563,100, what is its average collection period? b. If Brenmar reduces its average collection period to 15 days, what will be its new level of accounts receivable? c. Brenmar's inventory tumover ratio is 9.7 times. What is the level of Brenmar's inventories