Sherri runs a small florist shop and has estimated the following relationship: flower arrangements sold per month = 50TV0.6RAD0.2, where TV, RAD are the number of tv and radio ads, respectively, that she runs each month. A local tv ad costs $400/ea and a radio ad costs $250/ea. Each flower arrangement she sells provides her with an additional $25 in profit. How many tv and radio ads should she run per month?