please help me in solving the attached with steps so i can understand

A firm showed the following sales budget! Jan Feb March 20,000 25,000 April May 30,000 35,000 40,000 )Its policy is to have 10% of next month's sales in ending inventory. Dec. 31 inventory was 1,800. This product requires 5 pounds of raw material (cost $6 per pound), and the raw material inventory policy is to hold 20% of next month's production in ending inventory. The Dec 31 raw material inventory met the firm's inventory policy. Required: a) production budget for January through March. b) raw material purchasing budget in units and dollars. c) The firm manages its accounts payable by paying 10% of a month's purchases in the month, taking a 10% discount, and paying the remaining 90% of the purchases one month later. Present a schedule of cash disbursements for the above purchasing budget