How much does the boat cost?

Let the full price be x

A pays     $$\frac{5x}{8}$$      (there will be 3x/8 left to pay)

B pays        $$0.256*\frac{3x}{8}$$

Rest will be        $$x-\frac{5x}{8}-0.256*\frac{3x}{8}=93000$$

Can you finish it?

this is a very good question.  first you must find the fraction of the cost that person C paid (5/8 + 128/5 + x).  Then you would get 30.6 + x, which is the fractional sum of the cost of persons ab and c.  Ok, I'm confused...sorry.

Do you want me to talk about it some more?

thanks a lot!