A financial company has decided to invest somewhere between $3,000,000 and $4,000,000 in a series of investments. Investment A is expected to return 8%, investment B 12%, and investment C 19%. Because investment C is high risk, the company does not want to invest more than 30% of its total purchase in investment C. It also wants to be sure that it invests at least as much in investment A as it does in investment B. Because of an odd quirk in the tax law, it does not want the total return on the investment to be more than $300,000. How much should it invest in each investment in order to maximize its return?