Henry wants to sell rings at a craft fair for $8 each. The materials for each ring cost $1.50, and the table rental at the fair costs $91 for the day. How many rings does he need to sell for his revenue to equal his expenses?
A. 140
B. 9
C. 10
D. 14
Let x be the number of rings Henry needs to sell.
Total cost = Total revenue
$1.50x + $91 = $8x
$6.50 = $6.50x
x = 10
Henry needs to sell 10 rings for his revenue to equal his expenses.
Therefore, the answer is C. 10.