Economics (effect of total revenue and price elasticity of demand)?

[Sara H]

3.The owner of a restaurant is considering lowering menu prices to draw in more customers. He is debating between lowering the price for the steak entrée or the salmon entrée. When he lowered prices last year, a $2.00 decrease in price for the $15 steak resulted in a growth in steak sales from 75 per week to 100 per week. A $2.50 decrease in the price of the $17 salmon entrée increased sales from 40 to 75 meals per week. Which entrée should he choose to put on sale? And why (Be sure to include the effect on total revenue and the price elasticity of demand)