$22,500 gross/$1.90 per mile = 11,842 miles
$26,000 gross/$1.70 per mile = 15,294 miles
Let's assume (you can give or take as you wish) it costs $1.50 per mile to operate your truck. Thus:
11,842 miles x $1.50 per mile = $17,763 to run the truck.
15,294 miles x $1.50 per mile = $22,941 to run...