Drew invested $20000 in a company that manufactures toy cars. It costs drew $1.50 to manufacture each toy car which he will then sell for $4.00. The system graphed below can be used to determine the break-even point, where expenses equal income. The variable y represents both the dollar amount of the expenses as well as the dollar amount of income. Y=20,000+1.50x, y=4.00x. What is the best estimate of the number of toy cars drew must sell to break even?