unit 8 integrated case study

there is this case of a company exiting a trade union. need a help regarding the calculation for current sales profit margin. it says the company turnover at full length is 8 M. These are information before exit: it export 40% of the output to the trade members. 50% of material are imported from trade members. material volumes are proportionally affected by changes in sales volume, including export. current exchange rate is C 1.4$/ M. question, current sales profit margin?
I was confused about how much of material costs i will include in my computation.