A hospital’s records show that the cost of carrying out health checks in the last five accounting periods has been as follows:

Using the high–low method and ignoring inflation, the estimated cost of carrying out health checks on 850 patients in period 6 is:

(a) \($17\) 515

(b) \($17\) 570

(c) \($17\) 625

(d) \($17\) 680

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Period Number of patients seen Total cost $ 12345 650 17125 940 17800 1260 18650 990 17980 1150 18360