A farmer wants to buy goats, sheep and calves; and the total money he has is 11900$
How many(goats, sheep and calves) can he buy for that money?
If the price for each is(one goat=460$; one sheep=500$; one calf=600$)
460g + 500s + 600c <= 11900
There is no unique solution. All you really know is that
25s <= 595 - 23g - 30c
Some possibilities are
g s c
10 2 10
2 10 9
9 14 1