Proozy offers the Under Armour Boy's Dominate Mesh Shorts in nine colors (Yellow pictured) for $19.99. Coupon code "BDSHORTS" cuts it to $15.99. With free shipping, that's the lowest total price we could find by $7. They're available in sizes XS to XL, although not in all size/color combinations.
Finish Line offers the Under Armour Toddler Boys' Spine Shoes in Steel/Black/Red for $19.98 plus $6.99 for shipping. That's the lowest total price we could find by $10. They're available in sizes 4 to 10.