the following selected amounts were extracted from the financial statements of Boston Corporation

year 4. year 3. year 2. year 1

net sales $175,000 $170,000 $165,000 $150,000

cost of goods sold $109,000 $104,500 $100,500 $93,000

gross margin $66,000 $65,000 $64,500 $57,000

Prepare trend analysis for net sales, cost of goods sold, and gross margin. (Round answers to the nearest tenth of 1 percent.) Use year 1 as the base year