The auditorium had 976 seats. There were 40% fewer $35-seats than $10-seats. 60% of the $10-seats and some $35-seats were sold. A total of $14370 was collected. How many seats were unsold?

	$35	$10	Total
Number	3 u	5 u	8 u

100% - 40% = 60%
⁶⁰₁₀₀ = ³₅

Total number of seats
= 3 u + 5 u
= 8 u

8 u = 976

1 u = 976 ÷ 8 = 122

Total number of $10-seat tickets
= 5 u
= 5 x 122
= 610

Number of $10-seat tickets sold
= 60% x 610
= ⁶⁰₁₀₀ x 610
= 366

Amount collected from $10-seat tickets sold
= 366 x 10
= $3660

Amount collected from $35-seat tickets sold
= 14370 - 3660
= $10710

Number of $35-seat tickets sold
= 10710 ÷ 35
= 306

Number of tickets sold
= 366 + 306
= 672

Number of tickets left unsold
= 976 - 672
= 304

Answer(s): 304