<prompt> Human: We spend about 500month on groceries currently for the two of us not including stuff for our dog and cat. We obviously dont buy in bulk; can you guys give me a breakdown of the advantages and initial costs of buying in bulk at Costco?  <response>: We are a two person household with a warehouse membership. For groceries? No.For paper supplies toilet paper, paper towels, yes. Dog treats, yes. Drinks like Red Bull, yes. They are also useful for random things like silverware and plates for work I dont have a cool job that supplies stuff and disposable to-go cups cleaning travel thermoses just doesnt happen. Also laundry detergent, bleach, and dish-washing soap.I do get a good bit of fruit there and I will buy steaks as well.I buy pizza there to. We get value out of it but we plan around it and buy in bulk. 