The amount of vitamin A in a liter of goat milk will be 2080 IU.
Step-by-step explanation
The ratio of the amount of vitamin A in cow milk to the amount of vitamin A in goat milk is

So lets assume, the amount of vitamin A in a liter of cow milk is
and

Given that, a liter of cow milk has 1560 IU of vitamin A. That means.......

So, the amount of vitamin A in a liter of goat milk will be:
IU.