Understanding  – and executing – Mommy math is crucial to a low-stress marathon grocery trip like the one Anthony and I are about to embark on. It’s simple, really. Just remember these equations to ensure a well-behaved preschooler:

However:

We’re working on a tight budget these days; however, $3.50 for a Happy Meal at the end of our shopping – “but only if you’re a good boy” – is a financial sacrifice I’m willing to make.