A total of $29,000 is invested in two funds paying 3% and 3.5% simple interest. (The 3% investment has a lower risk.) The investor wants a yearly interest income of $1000 from the two investments. (a) Write a system of equations in which one equation represents the total amount invested and the other equation represents the $1000 required in interest. Let x and y represent the amounts invested at 3% and 3.5%, respectively.

Data for hermann corporation are shown below: per unit percent of sales selling price $ 125 100 % variable expenses 80 64 contribution margin $ 45 36 % fixed expenses are $85,000 per month and the company is selling 2,700 units per month. required: 1-a. how much will net operating income increase (decrease) per month if the monthly advertising budget increases by $9,000 and monthly sales increase by $20,000? 1-b. should the advertising budget be increased?