Helping Hand Pop-n-Shop Cart for $12.99. Order online for in-store pickup at Kmart to lock in the price and save on shipping. Otherwise, shipping is $9.99. Here is a screenshot for your reference. This cart features lightweight, yet sturdy design and folds up for storage in car or home. It measures 38 1/2″H x 15″W x 10 1/2″D. Most places have it for about $19.