transfer total amount to another field

Creating a fased payment ; after selecting the product in the purchase order , 

Can the total amount from " the purchase order" being transferred to another field which then can be divided  in a fased paiement option.

Can this done by coding or manual with the calculator provided in your system.

To clarify, do you want to create a breakdown of payments? Can you please give us more information regarding "Fased Payments"?

You may try manually passing the calculation data into your payment field by following this guide:https://www.jotform.com/help/275-How-to-Pass-a-Calculation-to-a-Payment-Field

You can use the Form calculation widget to calculate your payment.

Guide:https://www.jotform.com/help/259-How-to-Perform-Form-Calculation-Using-a-Widget

Related Article:https://www.jotform.com/help/301-How-to-Assign-Calculation-Value

Please give it a try and let us know if this fits your requirements.