Answer:
$61.54 (rounded to nearest cent, that is 61 dollars and 54 cents)
Explanation:
Let's call the cost of bookstore from publisher as

Markup of 30% means that they increased their cost price by 30%. That is equal to 80.
original price is x
30% of x is

We add both to get the marked up price, which is

Equating this to 80 and solving for x gives us:

So the college bookstore bought from publisher at $61.54