How to fix: Adding value of checkboxes with different value for first two checkboxes

Attempting to Add together the value of a variety of check boxes based on the selection on the first two check boxes. The Select is used to represent a POST for a page and is the multiplier for 100kms and 200kms and the other check boxes. which gets shown at a daily rate without multiplying and a total with multiplying. I have a feeling it is either a syntax error or function call error.

I've tried to create a different set of functions to serve it's own purpose and inevitable add/ multiply things together. I've tried to change where the functions calls another such as DisplayVals1 and Calculate1. My Fiddle is here for viewing. https://jsfiddle.net/shiataz12/mjnqth3L/83/

 $("#qr3").click(function() {
 var n3 = $( "input[name='checkbox1']:checked" ).length;
 if(n3) {
 Calculate1();
 }
 else {
 Calculate2();
 }
 });

Above snippet is what i tried to use to run the addition of extra check boxes to the total.