Weird problem, can't set currency field using json2 even with correct syntax

Weird Problem. I've used json2 and REST endpoints to lookup values, but setting a currency item gives me the following error:

Everything else that I set seems to work, it's just the currency field that I can't set. I tried debugging, and I noticed this:

I know that to set currency values "setValue(parseFloat(eval" needs to be used, which is what I've used. But still no luck. I've highlighted the problematic field below in bold, the non-bold items work. Anyone know why it isn't working?

Code:

            //Set Global Variable for results
            var result_timesheet= data.d;
           
            //Set individual Variable for each attribute
            var new_blankVar = result_timesheet.new_blank;
            var new_RateVar = result_timesheet.new_Rate;
            var new_LimitVar = result_timesheet.new_LimitDuration;
            
            //replace the fields with the fields on your entity
            Xrm.Page.getAttribute("new_limitcallcharge").setValue(new_LimitVar);
            Xrm.Page.getAttribute("new_blank").setValue(new_blankVar);
            Xrm.Page.getAttribute("new_ratecalculator").setValue(parseFloat(eval(new_RateVar)));