Consider a four$-$step serial process with the number of workers at each step and processing times given in the following table.

$\backslash$table$[[$Process Step,Number of Workers,Time per Customer $($in$],[1,1,$Minutes$)],[2,3,7],[3,5,17],[4,4,10]]$

Assuming that the process starts out empty and is worker$-$paced, how long will it take $($in minutes$)$ to serve $28$ customers?

Note: Round to nearest minute.