Good day, this is a Management accounting question. How do I include the 'ending inventory' into the answer? Please assist.

Question 1 [2t] Marks] Steve manufactures picture frames. Sales for July are expected to be 1t],{][l[l units of various sizes. Historically, the average frame requires ve meters of framing, one square meter of glass, and one square meter of backing. Beginning inventory includes 1000 meters of framing, 1,501] square meters of glass: and germ square meters of hacking. Current prices are RUQU per meter of framing, R4.5[i per square meter of glass, and R150 per square meter of backing. Ending inventory should be 15D percent of beginning inventory. Purchases are paid for in the month acquired. Reg uired: 1.1 Determine the quantity of framing, glass, and backing that is to be purchased during July. {15]