The controller for Donut Cooking Oil Co$.$ established the following overhead cost pools and cost drivers:

$\backslash$table$[[$Overhead Cost Pool,Budgeted Overhead,Cost Driver,Estimated Cost Driver Level$],[$Machine setup,$$42,900,$# of setups,$33$ setups$],[$Materials handling,$$37,440,$# of barrels,$2,340$ barrels$],[$Quality control,$$94,860,$# of inspections,$306$ inspections$],[$Machine utilities$/$ maintenance,$$51,750,$# of machine hours,$3,450$ machine hours$]]$

An order of $80$ finished barrels of cooking oil used:

$\backslash$table$[[$Machine setups,$3$ setups$],[$Materials handling,$246$ barrels$],[$Quality inspections,$30$ inspections$],[$Machine hours,??? machine hours$]]$

If the company uses activity$-$based costing and the total overhead charged to the order was $$21,546,$ how many machine hours were used to complete the ord