Isaiah is a salesperson who sells computers at an electronics store. He makes a base pay amount each day and then is paid a commission as a percentage of the total dollar amount the company makes from his sales that day. The equation P=0.025x+85P=0.025x+85 represents Isaiah's total pay on a day on which he sells xx dollars worth of computers. What is the yy-intercept of the equation and what is its interpretation in the context of the problem?