5. Shawn started an online store at ebay selling graphic t-shirts. In order to have mobile internet access, he subscribed AT&T mobile broadband $79 per month. Steve purchased the t-shirt from whole sale price of $6.50 and sells it for $19.99 at ebax Also each t-shirt costs him $7 to design and print. Please calculate the break event point for Steve's t-shirt business. 6. NCC mem's basketball team raised ticket price from $15 to $18 last season. The ticket sales dropped from average 4,500 to 4,100 per game. (1) Please calculate the price elasticity of demand. (2) calculate the revenue change after the price drop