Copying data from one list member to another
I need to copy data for a particular line item (number format) which is a user input from one list member to another. Use case: We have set up a target setting model wherein User will input targets for their Financial Metrics at various stages throughout the year. The stages are performed one after another in a periodic manner, so we have the stages as a List. Now after a user inputs the targets for Stage 1 and they move on to Stage 2, they need to be able to copy the data from Stage 1 to Stage 2.
Is there a way this could be done which doesn't involve creating further line items or writing formulas, since this Line Item for Stage 2 also needs to be a user input?