High$-$low method for a service company

Sierra Railroad Inc. decided to use the high$-$low method and operating data from the past six months to estimate the fixed and variable components of transportation costs. The activity base used by Sierra Railroad is "gross$-$ton miles," which is the total number of tons multiplied by the miles moved.

$\backslash$table$[[,$Transportation Costs,Gross$-$Ton Miles$],[$January$,$$$752,600,301,000],[$February$,839,100,336,000],[$March$,593,000,218,000],[$April$,804,500,326,000],[$May$,674,700,262,000],[$June$,865,000,354,000]]$

Determine the variable cost per gross$-$ton mile and the total fixed cost.

Variable cost $($If required, round to two decimal places.$)$ per gross$-$ton mile

Total fixed cost $