The total ratio representing the number of cookies and Oreos that Zack bought is 4+9=<<4+9=13>>13
The fraction representing the number of Oreos Zane bought is 4/13, and since the total number of items in the box is 65, Zane bought 4/13*65=<<4/13*65=20>>20 Oreos.
If Zane bought 20 Oreos at $2 each, the total cost of buying Oreos is $2*20=$<<20*2=40>>40
Since the total number of items in the box is 65, and there are 20 Oreos in the box, the number of cookies in the box is 65-20=<<65-20=45>>45
The cost of buying the cookies at $3 each is 45*$3=$<<45*3=135>>135
If the Oreos cost $40 to buy, Zane used $135-$40=$95 more to buy Cookies than Oreos.
#### 95