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$,$$$1,262,700,360,000],[$February$,1,407,900,403,000],[$March$,995,000,261,000],[$April$,1,349,800,390,000],[$May$,1,132,100,314,000],[$June$,1,451,400,424,000]]$

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

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

Total fixed cost $?$