Marilyn Terrill is the senior auditor for the audit of Uden Supply Company for the year ended December 31, 20X4. In planning the audit, Marilyn is attempting to develop expectations for planning analytical procedures based on the financial information for prior years and her knowledge of the business and the industry, including these: 1. Based on economic conditions, she believes that the increase in sales for the current year should approximate the historical trend. 2. Based on her knowledge of industry trends, she believes that the gross profit percentage for 20X4 should be about 2 percent less than the percentage for 20X3. 3. Based on her knowledge of regulations, she is aware that the effective tax rate for the company for 20X4 has been reduced by 5 percent from that in 20X3. 4. Based on a review of the general ledger, she determined that average depreciable assets have increased by 10 percent. Purchases of equipment occurred relatively evenly throughout the year. 5. Based on her knowledge of economic conditions, she is aware that the effective interest rate on the company's line of credit for 20X4 was approximately 12 percent. The average outstanding balance of the line of credit is $3,400,000. This line of credit is the company's only interest-bearing debt. 6. Based on her discussions with management the advertising and sales commission percentages are expected to stay the same. Based on her knowledge of the industry, she believes that the amount of other expenses should be consistent with the trends from prior years.