need help with calculating marginal cost pricing.

overhead cost "7.3 Allied Laboratories is combining some of its most common tests into one-price packages. One such package will contain three tests that have the following variable costs: Test A Test B Test C Disposable syringe $3.00 $3.00 $3.00 Blood vial 0.50 0.50 0.50 Forms 0.15 0.15 0.15 Reagents 0.80 0.60 1.20 Sterile bandage 0.10 0.10 0.10 Breakage/losses 0.05 0.05 0.05 When the tests are combined, only one syringe, form, and sterile ba dage will be used. Furthermore, only one charge for breakage/los will apply. Two blood vials are required, and reagent costs will rem the same (reagents from all three tests are required). 159gas d a. As a starting point, what is the price of the combined test assu marginal cost pricing