At the beginning of months 1, 2, 3, and 4, the Simplex Company receives certain revenues, after which it pays the bills: Revenues Bills Month 1 $800 $600 Month 2 $800 $500 Month 3 $300 $500 Month 4 $300 $250 Any money left over may be invested for 1 month at an interest rate of 1%, or for two months at an interest rate of 3%. For example, x dollars invested at the beginning of month 2 becomes 1.01x dollars at the beginning of month 3, and 1.03x dollars at the beginning of month 4.