TrAmp Inc. recorded the following data for last six months’ activities:

Month …. Transportation costs ($)…………. No. of deliveries made
Jan …………………… 8600……...……………………………... 797
Feb …………………… 8430……...……………………………... 770
Mar …………………… 8210……...……………………………... 721
Apr …………………… 8690……...……………………………... 760
May …………………… 8760……...……………………………... 810
Jun …………………….. 8530……...……………………………... 779

Using the high-low method, the company’s

(a) variable transportation cost per delivery (2 decimal places) is $ 

(b) fixed transportation cost per month is $

(c) If the company makes 838 deliveries in July, the expected transportation cost will be $.