P12-51A. (Learning Objectives 1, 4: Computing trend percentages, return on sales, and comparison with the industry) Net sales, net income, and total assets for Canberra Shipping Company for a five-year period follow:

Requirements 1. Compute trend percentages for each item for 20X5 through 20X8. Use 20X4 as the base year and round to the nearest percent.
2. Compute the net profit margin for 20X6 through 20X8.
3. How does Canberra Shipping’s net profit margin compare with that of the industry? In the shipping industry, rates above 5% are considered good, and rates above 7% are outstanding.

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(In thousands) Net sales.... Net income.... 20X8 20X7 20X6 20X5 20X4 $672 $518 $378 $330 $320 39 35 51 38 30 Total liabilities 315 277 265 229 210