Only need help with part B. Would the percentage be 30/130 & 1/3? Or would it simply be 30/130?

E8.14 (LO 4) (Gross Profit Method) Mark Price Company uses the gross profit method to estimate inventory for monthl, purposes. Presented below is information for the month of May. Instructions a. Compute the estimated inventory at May 31 , assuming that the gross profit is 30% of sales. b. Compute the estimated inventory at May 31 , assuming that the gross profit is 301/% of cost