A bakery sells two types of cookies: chocolate chip and oatmeal. On Monday, the bakery sold 50 chocolate chip cookies and 30 oatmeal cookies for a total of $260. On Tuesday, they sold 50 chocolate chip cookies and 70 oatmeal cookies for a total of $420. If represents the price of one chocolate chip cookie and represents the price of one oatmeal cookie, what is the price of one oatmeal cookie?
$2.50
$3.00
$3.50
$4.00
