What are the estimated slack times (in weeks) for activities A-H?

Which of the following statements is true?

A. When cost of goods sold as a percentage of sales increases the gross margin percentage will increase. B. It is possible for cost of goods sold in dollars to increase while cost of goods sold as a percentage of sales decreases. C. If gross margin percentage is the same for the current and past year, then sales and cost of goods sold in dollars did not change. D. Both B and C are true. E. All of the above are true.

Cost of goods sold is obtained from

a. analysis of all the control accounts in the cost system. b. the finished goods inventory records. c. the work in process inventory records. d. the Raw Materials Inventory control account.