Ok moms. sometimes when you shop for more than 3 kids?

do you find it frustrating. say if you buy the 8 pack of granola bars, well i have 4 kids so for 4.00 that is only 2 days of snacks. or gummy fruits 8 pack again TWO days. my kids love the sponge bob go garts and its 6.00 for 16 sounds great but 4 days for 6.00. i do shop at costco but i cant always get there. any ideas for snacks that they LIKE but last more than 2 days. thank you.