How much does fiberglass cost?

Depending

there are different kinds of fiberglass

Fiberglasss such as cloth, fiberglass Mat, Woven Roving Combo (MAT and Roving. and different weight, in ounces as an example 2oz, 4oz, 6oz, 7.5oz, 10oz, 18oz, 24oz etc. for heavy and light reinforced. For give you an idea of what is the price