Three products A, B, and care produced using four types of machines R1, R2, R3, and R4. The firm owns 3 machines of type R4 and 1 of each other type. One worker is responsible from each rrachine-a total of 6 workers. Workers are available 10 hrs a day for 5 days a wook How many minutes of additional labor are needed to eliminate the bottleneck resource? RI-20 min R2 10 min R4 15min A, demand 40/wk price = $90/unit Requirements for A-law material: $10/unit, Purchased pails: $20/unit KZ 40 min R4 30 min R2 20 min B, demand =50/wk price $100/unit Requirements for B-Raw material: $15/unit, Purchased parts: $15/unit RI - 30 min R3-25 min 14- 20 min C, demand=80/wk price - $90/unit Requirements for C-Raw material: $5/unit. Purchased parts: $10/unit Multiple Choice 500 200 0 700