The number of blood tests performed and the related costs over the last nine months in Brentine Hospital are given below. 3 Month January February March April Blood Tests Performed 4,335 4,850 Blood Test Costs $ 28,382 $ 30,370 $ 25,929 $22.542 $ 23,606 $ 19,190 $ 21,534 $ 26,850 $ 29, 330 May June July August September 2,700 3,255 4.155 4,550 Required: 1. Using the high-low method, estimate the cost formula for blood tests. (Round cost per unit answer to 2 decimal places.) Y $ 5 150 + 5 520 X