Answer
The total cost of ordering $26$ shirts is $\$430.8$
Work Step by Step
We have $x=26$.
Use the second equation.
$c(x)=15.80x+20,$ if $25\leq x \lt 50$
Substitute $26$ for $x$.
$\Rightarrow c(26)=15.80(26)+20$
Simplify.
$\Rightarrow c(26)=410.8+20$
$\Rightarrow c(26)=430.8$
Hence, the total cost of ordering $26$ shirts is $\$430.8$
