Create running total?

Hey, just want to know how to create a running total/ running balance in Calc…

Am currently reading the section on formulas in the libreoffice manual so I’m sure I will get there eventually, I am just in a hurry to figure it out for some work that I am doing.

Thanks.

It should be fairly simple - just add the new amount to the previous sub-total…
The attached file shows one way

running_total.ods