Value Total taken from SubForms

Value Total taken from SubForms

I have a question about getting a Total Value for the order based on grabbing data from sub Forms. 

We have a large input file which contains a new Report for each Activity within a Job creating a large disjointed data base. From that large IMPORT file we are then pushing certain information from that Import file into separate more specific forms. 

I have one form right now that is called Work Order. In Work Order there is the SubForm Jobs. A Work Order can contain 1-infinite amounts of Jobs that relate to a specific Customer. We are a Printing facility so each Job is a file, print, cut, packaged workflow that in the end is under the same umbrella as another set of file, print, cut, package workflow. I am trying to get the Value of each Job (which I think is in the subform) and add that information up for a Work Order Total. 

What deluge script scenario would I use in the Action Fields, or where and what formula can I write to correctly grab the information from the Job Subform related to the Work Order Number?

I know what areas of my database I should connect but the correct script/or formula I can not figure out.