A firm works 40 hours a week and has a capacity of overtime work to the extent of 20 hours in a week. It has received seven orders to be processed on three machines A, B, and C, in the order A, B, C to be delivered in a week's time from now. The process times (in hours) are recorded in the given table.

The manager, who, in fairness, insists on performing the jobs in the sequence in which they are received, is refusing to accept an eighth order, which requires 7, 2, and 5 hours respectively on A, Band C machines, because, according to him, the eight jobs would require a total of 61 hours for processing, which exceeds the firm 's capacity. Advise him.

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68 21 59 Job 1 2 3 4 Machine A: 7 8 6 6 7 Machine B : 2 Machine C 6 25 1 4 3 4 3 2 7 5 5 4 1 5