125380 ajax calculator

Perfect project for a good feedback. Need a simple ajax calculator. User Enters Sales Price : $500,000.00 Drop Down box -Select Buyer Agent Compensation- 1%, 1.5% 2.0%, 2.5%, 3.0%, 3.5% Presses Enter and calculations should be based on the percentage. Sales Price * (1%) = $5,000.00 - 500,000.00 = 495,000.00. Design is important so make it look good. 2 includes files.