Sum specific number of cells in one column

Hi there

Can someone help me to build a formula to sum an exemple like this:

The column goes from "A10 to A20" and i have the cell "D10" to imput a value to say that it will allways start in A10 but to end the "SUM" in the number defined by me, like sometimes it can sum only fromA1 to A3 or A1 "to the number that i imput on the cell" "D10" and have the result for exemple in cell D15.

Example:
If cell D10 have the value 5 SUM from A10 to A15.
If the number from cell D10 changes to 7 and SUM changes from A10 to A17.

Thank you so much.
Armando

Using your posted example, this formula sums from A10 through the number of cells indicated by D10

Please Login or Register  to view this content.

Is that something you can work with?

As this is an entirely new question please start a new thread perhaps with a link to this one - Thx