If this is python3.x you have to do it as follows:
if game_list[game]>= 10:
print ("The Price for this Game is: $", game_prices[game]*1.1)
For python2.7, it would be:
if game_list[game]>= 10:
print "The Price for this Game is: $"+game_prices[game]*1.1
solved How to show the cost of a game using this Python [closed]