I dont get this question

Question

A fish market bought two swordfish at a rate of 

$12 per pound.

 The cost of the larger fish was 

3 times

 as great as the cost of the smaller fish. The total cost of the 

two fish

 was $3,744.

 

How much did each fish weigh?

Answer 1

L=3s

4s=3744

s= $936/$12= 78 lbs of the smaller

L=3(78)= 234 lbs Larger

234(12)= 2808

2808+936= 3744