please include work, i would like to understand. thank you!

Case Manufacturing expects to have 58,000 pounds of raw materials inventory on hand on June 30, the end of the current year. The company has budgeted the following production for the first four months of the coming year: Production (units) July 118,000 August 138,000 September 168,000 October 128,000 Case Manufacturing desires each month's ending raw materials inventory to be 30% of the following month's production needs. A finished unit requires two pounds of raw materials. Case Manufacturing's budgeted purchases of raw materials during July (in pounds) should be: Multiple Choice 236,000 pounds 318.800 pounds 260,800 pounds 401,600 pounds 82.800 pounds