TB MC Qu$.07-12$ C&A Furniture uses a four$-$step process...

C&A Furniture uses a four$-$step process to make its famous wood table:

Process Processing Time $($minutes$)$

Milling$$table top $10$

Milling$$table stand $5$

Assembly $15$

Finishing $20$

The milling machine requires a setup time of $30$ minutes to make table tops and a changeover time of $25$ minutes to make table stands. What is the total setup time $($in minutes$)$ in the above process?