hi guys...

im just new here and i really need your help guys regarding my excel. i am trying to make a tracker of my computer rentals that i can use in my computer shop. i already input some formula and it pretty works. but my problem is that, every time i add an addition rental on the succeeding rows, the time and date of the previous time is always changing in current time. attached here is the example of my spreadsheet.. sorry for the apperance because im just novice in creating this kind of tracker. hopefully you can help me guys.. i owe this one...thanks again..

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