Math Skills Could Get You a Shopping Spree

This is an awesome little gimmick.  A convince store owners son has started giving away a five second shopping spree to customers who answer simple math questions.  The questions usually are not super hard.  One of them was 7×7 + 10 = (59 is the answer), the customer got it correctly and was able to go on a five second shopping spree and grab as much as possible.  Some of the videos on social media look a little staged because someone took cash out of the drawer and a whole bunch of lottery tickets, but other than that this is a legit thing they are doing.  Are you good enough at simple math to win yourself a shopping spree?
http://bronx.news12.com/story/41647714/bronx-man-goes-viral-for-rewarding-bodega-customers-who-solve-math-problems