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.

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

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

Total fixed cost $