SUM Values based on Location, SSL and Month, show the result in Output sheet

Hi I need a sum if or any other formula which can help me retrieve value from the Excel tab (CT Cost) to the Output tab
so when I select "ALL", it should give me the aggregated results and vice versa based on the drop-down selection I am making



1) Sum the values from CT Cost tab to Output sheet which has dropdowns
2) Based on the selection of the dropdowns the values should reflect
3) there are 3 variables, SSL, Location and month

Administrative Note:

We would very much like to help you with your query, however the thread title does not really convey what your request is about. Tell us what you are trying to do, not how you think it should be done.

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Thank you.

Please be patient.

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Please try in Output!B6 copied across to M6:

Formula:

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Note that this is an array formula. O365 should deal with this automatically. In pre-O365 versions the formula must be committed via CTRL-SHIFT-ENTER.

See the attached update to your workbook.