COUNTIF when counting a range such as 1-5

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Source Sheet Columns: Reviewer - Time (days) - Text is numbers

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Need Formula: I want to count how many fall into all the rangers below. I know it's a COUNTIF but cant figure it out.

1-5 Days

6-10 Days

11-15 Days

16-20 Days

21-25 Days

26-30 Days

More than 30 Days

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