if each pin takes 8 3/4 minutes to process
61 pins will be 61 * 8 3/4 :)
then subtract 61 minutes, to exclude the lathe placement [tex]\bf \begin{cases}
8\frac{3}{4}\implies \cfrac{8\cdot 4+3}{4}\implies \cfrac{37}{4}
\end{cases}
\\ \quad \\
\left( 61\cdot\cfrac{37}{4} \right)-61[/tex]
