The answer is He bought 2 packs of each. Let me break it down 4 u: So basically, if u add 3 +6 u would get $9, right? But the question informs u that he spent $18 TOTAL! Sooooo, if u divide 18 by 9 then u would get 2! So, mathematically proven, the answer is 2 packs each! I hope this helped u please comment if it did!