Amend index aggregate formula

Hi!

I have created a calendar that shows the absences of employees based on abbreviations. For this, a formula in area B4:AF6 takes the absence data from the Data sheet. So far all absences are displayed in the calendar. I want to change the formula so that only absences with the abbreviations H, H1 and D are displayed. Unfortunately I don't know how to approach this problem. Can anyone help?

Thanks
Marc

Administrative Note:

Welcome to the forum.

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