You are asked to generate a master production plan for an independent item in the next four weeks. The demand forecast is: (30,30,30,30); the amount of committed customer orders is: (33,20,10,4); the lot size for this item is given as 70 ; and the initial on-hand inventory is 67. So the available-to-promise inventory for week 2 should be: 56 11 13 14 59