To find the desired ending direct materials inventory in pounds, we need to know the total direct materials required for production and the beginning direct materials.
If the required direct materials purchases are 31500 pounds and the direct materials required for production is three times the direct materials purchases, then the direct materials required for production is 31500 * 3 = <<31500*3=94500>>94500 pounds.
If the required direct materials purchases are 31500 pounds and the direct materials required for production is three times the direct materials purchases, then the direct materials required for production is 31500 * 3 = <<31500*3=94500>>94500 pounds.
To find the desired ending direct materials inventory in pounds, we need to subtract the direct materials required for production from the beginning direct materials. This gives us 110250 - 94500 = <<110250-94500=15750>>15750 pounds.
Therefore, the desired ending direct materials inventory in pounds is 15750