Consider the assembly line below. The three fabrication operations run in parallel, such that each batch of $20$ units only needs to go

through one of the three fabrication operations. After that, each batch needs to go through both assembly operations, which occur

simultaneously $($specifically$,10$ components are made for each unit in the fabrication stage$-$some components are then assembled

in the Assembly $1$ area while others are assembled in the Assembly $2$ area$).$ The units are packaged and made ready for shipment in

the final stage.

What is the throughput time per batch of this operation?

$88$min.

$8$min.

$40$min.

$34$min.

$33$min.