Answer:
$75
Explanation:
Since the original cost is $60 then this is 100% the price. The new price which is marked up 25% will be in comparison 125% of the original cost. To find the new price set up a proportion with these values:

Solve for the original price by cross multiplying numerator with denominator.
x(100) = 60(125)
100x = 7500
x= $75