Cost Estimation.

The following data was obtained from historical data:

Month	Volume	Cost
April	700	20,800
May	900	22,000
June	760	21,000
July	400	18,100
August	820	21,200
September	880	21,600
October	550	19,400
November	650	20,200

1. Calculate an estimate of fixed costs using the high-low method.