The opera house had 2240 seats. There were 40% fewer $35-seats than $20-seats. 75% of the $20-seats and some $35-seats were sold. A total of $32095 was collected. How many seats were unsold?

	$35	$20	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 = 2240

1 u = 2240 ÷ 8 = 280

Total number of $20-seat tickets
= 5 u
= 5 x 280
= 1400

Number of $20-seat tickets sold
= 75% x 1400
= ⁷⁵₁₀₀ x 1400
= 1050

Amount collected from $20-seat tickets sold
= 1050 x 20
= $21000

Amount collected from $35-seat tickets sold
= 32095 - 21000
= $11095

Number of $35-seat tickets sold
= 11095 ÷ 35
= 317

Number of tickets sold
= 1050 + 317
= 1367

Number of tickets left unsold
= 2240 - 1367
= 873

Answer(s): 873