Two competitive websites have recently been promoting their beverage delivery services, Phil's site purchased banner ad receiving 13,500 impressions. Stu used search engine advertising that was viewed 18,600 times and produced 229 clicks. Stu paid an average of $1.80 per click. Phil's banner ads yielded clickthrough rates of 1.61% and 20% of those visits resulted in an order. The banner ads costs for Phil's campaign were $691. Stu recorded 21 purchases from clicks produced by his search engine advertising How many clicks did Phil's advertising generate