Answer:
6561 types of bags
Explanation:
You have eight spots (eight chocolate bars) and each spot can be filled out with 3 items (kit kat, reese's or almond joys). So, all you have to do is multiply every possibility for every spot. Thus, the thing looks like this:
3x3x3x3x3x3x3x3= 6561 possibilities or
3^8= 6561 possibilities