Answer:
$63
Explanation:
Alana has 4 units of the $171.
Brianna has 7 units of the $171.
Carla has 8 units of the $171.
Total units = 4 + 7 + 8 = 19
19 units = $171
1 unit
Brianna has 7 units, so she receives 7 x $9 = $63.
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