How do you solve for K and L? Having trouble simplifying.

An Example As the CEO of a manufacturing firm, you know that your cost of capital and labor services are $160 and $90 per unit, respectively. You also know that your production function assumes the following mathematical form: 7 You have just received an order for 500 units of your product. You like to know how many units of capital and labor that you need to use to produce 500 units of the product at the least possible cost