Budget

Good afternoon John Can u please walk me through this Question. Thank you A Co. Manufactures a single product.Budgeted production for the first 3 mths of next yr.is as follows; mth 1 8000 units mth 2 9000 units mth 3 7000 units each unit uses 4 kg of raw material costing $5 per kg. The Budgeted raw mater inventory at the end of each month is to be 20% of the following months production. What are the budgeted raw material purchases for mth 2 of next year (in $)