The Hospital Kitchen Has A $55$ -Pound Bag of Flour $\frac { 3 } { 4 }$

The hospital kitchen has a $55$ -pound bag of flour. At the end of the week, $\frac { 3 } { 4 }$ of the bag has been used. How many ounces of flour remain in the bag at the end of the week?

A) $220$ oz
B) $230$ oz
C) $225$ oz
D) $215$ oz
E) $210$ oz