Question 102198
Ok this is not a  logic question so lets try it out...

125x72=9000 and 72 tons
75x120=9000 and 120 tons


That is the basic, we're not down to the answer.. yet

we need a little educated guess, so lets try 16 tons of $125 and 84 tons of $75.


125x16=2000
75x84=6300

2000+6300=8300

Pretty close.. the difference between 125 and 75 is 50 and we need 700 more so:

700/50=14 

That means we need to turn 14 tons of $75 into $125 tons.

So that means we should have 30 tons of $125 and 70 tons of of $75

125x30=3750
75x70=5250

3750+5250=9000
30+70=100

Oh we now found the answer.. there were 30 tons worth $125 ans 70 tons worth $75.