I need help figuring out the very last question which is THE TOTAL COST WITH PLAN 6

Table 1 Month Production Days 22 Demand Forecast 900 1 January 2 February 18 700 3 March 21 800 Avg Dem Per Other data Prod. Day Inventory carrying cost $8 per unit per month Subcontracting cost per unit $12 per unit 40.91 Average pay rate $5 per hour ($40 per day) Overtime pay Rate $7 per hour (above 8 hrs per 38.89 day) 38.10 Labor-hours per unit 1.6 hrs per unit 57.14 Cost of increasing daily $300 per unit production rate (hiring & 68.18 training) 55.00 Cost of decreasing daily $600 per unit production rate (layoffs) 21 1,200 4 April 5 May 6 June 22 1,500 1,100 20 The production rate per day = 30 units. (Enter your response as a whole number.) Fill in the table below. (Enter your responses as whole numbers.) Regular Production Demand 900 Subcontract (Units) 240 660 Month 1 January 2 February 3 March 700 540 160 800 630 170 630 570 4 April 5 May 1,200 1,500 1,100 660 840 6 June 600 500 The total regular production cost = $ 29760. (Enter your response as a whole number.) The total subcontracting cost = $ 29760 . (Enter your response as a whole number.) Total cost with plan 5 = $ 59520 . (Enter your response as a whole number.) b) Juarez has yet a sixth plan. A constant workforce of 7 is selected, with the remainder of demand filled by subcontracting. Evaluate this plan. The production rate per day = 35 units. (Enter your response as a whole number.) Fill in the table below. (Enter your responses as whole numbers.) Demand 900 Regular Production Subcontract (Units) 770 130 Month 1 January 2 February 3 March 700 630 70 800 735 65 735 465 4 April 5 May 6 June 1,200 1,500 770 730 1,100 The total regular production cost = $ 34720 . (Enter your response as a whole number.) . The total subcontracting cost = $ 22320. (Enter your response as a whole number.) Total cost with plan 6 = $ (Enter your response as a whole number.)