Oscar, Perry, Howard and Tommy paid a total of $30 for a souvenir. Tommy paid ²₃ of what the rest paid. Oscar paid 50% of what the rest paid. Perry and Howard paid an equal amount of money. How much did Howard pay?

Oscar	Perry	Howard	Tommy	Total
3x3			2x3	5x3
1x5	2x5			3x5
	1	1
5 u	2 u	2 u	6 u	15 u

50%= ⁵⁰₁₀₀= ¹₂
Oscar's share : Total share = 1 : 2

The total amount paid for the souvenir is repeated.  Make the total amount the same.  LCM of 5 and 3 is 15.

Amount that Perry, Howard and Tommy paid = 10 u

Amount that Perry and Howard paid
= 10 u - 6 u
= 4 u

The amount that Perry and Howard each paid is the same.

Amount that Perry and Howard each paid
= 4 u ÷ 2
= 2 u

Cost of the souvenir = 15 u

15 u = 30

1 u = 30 ÷ 15 = 2

Amount that Howard paid
= 2 u
= 2 x 2
= $4

Answer(s): $4