Average spend per trip is the same at about $50.
In looking at the 52-week period ending July 6, 2012, shopping rates for same-sex partnered households were nearly the same as those for the average U.S. household in the three main traditional channels (grocery, mass merchandiser, and drug). However, same-sex households shop more than the average U.S. household in several other important retail channels, such as warehouse club stores, pet stores, online retailers, electronics stores and health food retailers.
Ladies spend more on cat food, gents on dog food. Seriously.