I am trying to answer section problem 1 about a product line profitability report. I do not have any margins on my side only sales and COGS.

I am trying to answer section problem 1 about a product line profitability report. I do not have any margins on my side only sales and COGS. Everything else is the same and for me to answer the question is says "Required:

Prepare a product-line profitability report for SFS under the current costing system. (Loss amounts should be indicated by a minus sign. Round operating margin (loss) to 2 decimal places (i.e. .2134 should be entered as 21.34%)."