# Assigning values from Column Summaries to Fields

Hi there,

This seems like it would be quite simple, but I have not been able to find a way to assign the "Sum" from a Column Summary to a Field.

In the image below, I have a custom object that tracks 'Payments' related to a 'Contact'.

Ideally, I would like to assign 'Summary A' and 'Summary B' to Fields on the Contact model.

Finally, I could have a Formula Field on the Contact called 'Payment Balance'.

Any help or suggested alternatives would be greatly appreciated.

This seems like it would be quite simple, but I have not been able to find a way to assign the "Sum" from a Column Summary to a Field.

In the image below, I have a custom object that tracks 'Payments' related to a 'Contact'.

Ideally, I would like to assign 'Summary A' and 'Summary B' to Fields on the Contact model.

Finally, I could have a Formula Field on the Contact called 'Payment Balance'.

**'Payment Balance'**Β =**'Summary A'**(minus)**'Summary B'**

Any help or suggested alternatives would be greatly appreciated.

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## Comments

I'll try using the rollup summary field for the time-being as a work-around. Cheers.

Thanks for all your help Rob! Greatly appreciated.