find the last entry that was made in a column

I was afraid how I said it would not be understood. Let me try again.

I am tracking numbers in a column for a production run. as I produce and at certain time intervals I enter a number in a column for the task. Now I have a summary page which is looking at each of these columns and on this paticular column I want only the last entry to show up on my summary page. It is easy to do when you are summing a column it will keep adding as you enter and you just enter =the sum from page x cell y which is your sum. but instead of having sum or total I just want to report on my summary page the last entry that was made so instead of the sum be let say in the total cell or box it would be the last entry. If I was replacing the old entry each time I entered a new one it would be easy but i want to keep the prior entries and just enter a new entry below and have my summary look at the very last one automatically and report it on the summary page or sheet

I hope I have not made this even harder to understand