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Answer:
$21.84
Step-by-step explanation:
.30
31.20 * .30=9.36
31.20 - 9.36 =21.84
The price of the shirt before the markup is $21.84.
[CloudBreeze]
Search it up on google put the title :)
Hint: Try using the Pythagorean thereom to solve it.
It C. and if you need the equation for the area of a parallelogram its A=BH