b$.$ Calculate the profit or loss on $13,000$ boxes and $26,000$ boxes. $($Do not round intermediate calculations. Input all answers as positive values.$)$

$\backslash$table$[[$Boxes$,$Profit$/$Loss$,$Amount$],[13,000,$Loss,$v,$$$,12,500],[26,000,$Profit,$v,$$$,312,500]]$

c$-1.$ What is the DOL at $18,200$ boxes and $22,000$ boxes? $($Round the final answers to $2$ decimal places.$)$

$\backslash$table$[[$Boxes$,$DOL,$],[18,200,3\mathrm{.}87,x$