Owen bought 12 boxes of face masks that cost $9 per box. Each box has 50 pieces of masks. He repacked 6 of these boxes and sold them for $5 per 25 pieces. He sold the remaining 300 face masks in baggies at the rate of 10 pieces of mask for $3. How much profit did he make?
Owen bought 12 boxes for a total of $9/box x 12 boxes = $
<gadget id="calculator">9*12</gadget>
<output>108</output>
108.
Six boxes contains 6 boxes x 50 masks/box = 
<gadget id="calculator">6*50</gadget>
<output>300</output>
300 face masks.
Owen made 300 masks / 25 masks/repack = 
<gadget id="calculator">300/25</gadget>
<output>12</output>
12 repacks.
So, his revenue for selling those repacked face masks is $5 x 12 repacks = $
<gadget id="calculator">5*12</gadget>
<output>60</output>
60.
There are 300 masks / 10 masks/baggy = 
<gadget id="calculator">300/10</gadget>
<output>30</output>
30 baggies face masks.
So, his revenue for that is $3/baggy x 30 baggies = $
<gadget id="calculator">3*30</gadget>
<output>90</output>
90.
Hence, his total revenue for all the face masks is $60 + $90 = $
<gadget id="calculator">60+90</gadget>
<output>150</output>
150.
This gives him a profit of $150 - $108 = $
<gadget id="calculator">150-108</gadget>
<output>42</output>
42.

<result>42</result>