i need the answer for the last question thx

Consider the following aggregate planning problem for one quarter: Regular Time Overtime Subcontracting 1,000 200 150 Production Capacity/Month Production Cost/Unit 5 7 8 00 Assume that there is no initial inventory and there is forecasted demand of 1,250 units in each month in the quarter. Carrying cost is $1 per unit per month, and backlogs are not allowed. Use the transportation model to find the optimal solution. How much excess capacity is there? 300 > units What is the cost of the optimal solution? $20,400 How many units are actually made by subcontracting? 150 How many units incur a holding cost? In other words, how many are made in one month and held to meet the demand of a future month? [Select ] 3750 450 units 1250