I need to take one numerical field and add it to a date in a date/time field to result in a new date.

 

Using a form to create a schedule of activities to be done from certain number of days and weeks post hatching.

 

Example:  reduce temperature - 7 days post hatch date - results in date to perform the activity

 

Hatching_Date (date/time field) + 7 (days, weeks, or months) = Activity_Date 

 

I know how to do it with static number (ie Hatch_Date.addDay(7)  How do I do this with two entry fields?