Please help with A, B, C, & D

nt anout U the net monthly cash build or cash burn rate. ROA Model and Expenses Related to Sales) Use the financial statement data for Castillo Products pre- sented in Problem 6. A. Calculate the net profit margin in 2015 and 2016 and the sales- to-total-assets ratio using year end B. Use your calculations from Part A to determine the rate of return on assets in each of the two years C. Calculate the percentage growth in net sales from 2015 to 2016. Compare this with the percentage D. Express each expense item as a percentage of net sales for both 2015 and 2016. Describe what hap- data for each of the two years. for Castillo Products. change in total assets for the same period. pened that allowed Castillo Products to move from a loss to a profit between the two years