Could you solve this problem please? Thanks in advance.

CAN YOU DO IT? CALCULATING THE WEIGHTED AVERAGE COST OF CAPITAL In the fall of 2009, Grey Manufacturing was considering a major expansion of its manufacturing operations. The firm has sufficient land to accommodate the doubling of its operations, which will cost $200 million. To raise the needed funds Grey's management has decided to simply mimic the firm's present capital structure as follows: SOURCE OF CAPITAL AMOUNT OF FUNDS RAISED ($) PERCENTAGE OF TOTAL AFTER-TAX COST OF CAPITAL" Debt $ 80,000,000 40% 5.20% Common stock 120,000,000 60% 14.50% Total $200,000,000 100% What is your estimate of Grey's weighted average cost of capital? *You may assume that these after-tax costs of capital have been appropriately adjusted for any transaction costs incurred when raising the funds