Bang for Your Buck: How Much Do You Actually Spend in the Grocery vs. the Market?

Pepper contributor, Mia Marci, comparing grocery prices between a market and 3 grocery stores (Puregold, Hypermart and Rustan's):

List of groceries (via Pepper)

It is largely assumed that groceries are cheaper at the market, how much cheaper is it compared to the groceries? At a glance, one may dismiss it as just a few pesos difference, similar to how convenience stores tack on an additional P5 over the grocery price. But how significant is the price difference for one trip? One morning, a trip to the market, and three groceries later, I’d find out... Pepper.