Walmart offers the George Boys' or Girls' Short-Sleeve Polo Shirt 4-Pack in 14 colors (not pictured) for $22 plus 97 cents for shipping ($5.74/shirt). That's tied with our mention from a month ago as the lowest total price we could find for any such bundle, although we saw these for $2 less in February. These shirts are available in sizes XS to XXL, although not in all size/color combinations. They can be mixed and matched. There's always money in the banana stand.
Boy's George 3 Piece Set Organic Cotton Size 24 Months & 4t, a similar product, is available at these stores