A hospitals records show that the cost of carrying out health checks in the last five accounting periods have been as follows:

PERIOD	NUMBER OF PATIENTS SEEN	TOTAL COST ($)
1	650	17,125
2	940	17,800
3	1,260	18,650
4	990	17,980
5	1,150	18,360

Required:

Using the High-Low Method of cost estimation and ignoring inflation, determine the estimated total cost of carrying out health checks on 850 patients in period 6.