Young MBA Erica Cudahy can invest up to $15,000 in stocks and loans. Each dollar invested in stocks yields $0.10 profit, and each dollar invested in a loan yields $0.15 profit. At least 30% of all...

Young MBA Erica Cudahy can invest up to $15,000 in stocks and loans. Each dollar invested in stocks yields $0.10 profit, and each dollar invested in a loan yields $0.15 profit. At least 30% of all money invested must be in stocks, and at least $6000 must be in loans. Determine how Erica can maximize the profit earned on her investments.