A retailer spends [tex]$\$[/tex] 500[tex]$ per month to keep its online shop active and updated. The store acquires shirts at a marginal cost of $[/tex]\[tex]$ 5$[/tex] per shirt. Each shirt sells for a marginal benefit of [tex]$\$[/tex] 10[tex]$ per shirt.
What is the minimum number of shirts the retailer needs to sell in order to pay for all its costs in a month?
\begin{tabular}{|l|l|l|l|}
\hline Quantity of shirts sold & Marginal cost & Total cost & Marginal benefit \\
\hline 0 & $[/tex]\[tex]$ 0$[/tex] & [tex]$\$[/tex] 500[tex]$ & $[/tex]\[tex]$ 0$[/tex] \\
\hline 25 & [tex]$\$[/tex] 125[tex]$ & $[/tex]\[tex]$ 625$[/tex] & [tex]$\$[/tex] 250[tex]$ \\
\hline 50 & $[/tex]\[tex]$ 250$[/tex] & [tex]$\$[/tex] 750[tex]$ & $[/tex]\[tex]$ 500$[/tex] \\
\hline 75 & [tex]$\$[/tex] 375[tex]$ & $[/tex]\[tex]$ 875$[/tex] & [tex]$\$[/tex] 750[tex]$ \\
\hline 100 & $[/tex]\[tex]$ 500$[/tex] & [tex]$\$[/tex] 1,000[tex]$ & $[/tex]\[tex]$ 1,000$[/tex] \\
\hline 125 & [tex]$\$[/tex] 625[tex]$ & $[/tex]\[tex]$ 1,125$[/tex] & [tex]$\$[/tex] 1,250$ \\
\hline
\end{tabular}
A. 125
B. 25
C. 100
D. 75