Jquery Ajax简单应用程序：缺少）参数列表之后

I'm pulling my hair out here. I keep getting "missing ) after argument list" on my final line of code. I'm thinking it has something to do with my concatenation but I can't figure it out. It's jQuery with jQuery UI: a simple slider. User increases the amount on the slider and the available flights at that amount are displayed. Clicking on the available flight shows the duration:I'm pulling my hair out here. I keep getting "m