Caden, Howard, Bobby and Mark paid a total of $156 for a souvenir. Mark paid ⁶₇ of what the rest paid. Caden paid 50% of what the rest paid. Howard and Bobby paid an equal amount of money. How much did Bobby pay?

Caden	Howard	Bobby	Mark	Total
7x3			6x3	13x3
1x13	2x13			3x13
	1	1
13 u	4 u	4 u	18 u	39 u

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

The total amount paid for the souvenir is repeated.  Make the total amount the same.  LCM of 13 and 3 is 39.

Amount that Howard, Bobby and Mark paid = 26 u

Amount that Howard and Bobby paid
= 26 u - 18 u
= 8 u

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

Amount that Howard and Bobby each paid
= 8 u ÷ 2
= 4 u

Cost of the souvenir = 39 u

39 u = 156

1 u = 156 ÷ 39 = 4

Amount that Bobby paid
= 4 u
= 4 x 4
= $16

Answer(s): $16