You're pursuing a career in sales, and your commission earned is determined by the following information: if you earn less than $500 in sales, then your commission is 25% of your total sales. if you earn between $500 and $700 in sales, then you will earn $70 plus 35% of all of your total sales over $500. finally, if you earn more than $700 in sales, then you will earn $100 plus 55% of all of your total sales over $700. express your commission c as afunction of sales, x. your function should be expressed as a piece-wise defined function. keep that concept in mind. what would be your commission if your sales are $560?