500px and Wave have launched a new photo contest. Wave is a smart online application for invoicing, accounting and payroll that helps small businesses (such as photography studios). The winner of this week’s photo contest will receive a $500 gift card and exposure on Wave’s social media channels. The theme is “Storefronts” and photographers have until Sunday 17th March to submit their work. Note that you need to have a 500px profile in order to enter the competition.