Dear Eric: My husband and I, both happily retired with good pensions and Social Security, make our weekly grocery trips together. We take turns paying with our flight-points credit cards. Once the bill arrives, we split the cost of our groceries down the middle, sharing the expenses equally for everything we purchase at our preferred grocery store. Our grocery shopping typically includes a few low-cost personal favorites that not both of us enjoy eating, but for the sake of simplicity, we have agreed to split the grocery costs evenly, 50/50. My husband sometimes indulges in a piece of costly, extra-smoked pork he orders online from a specialty shop.