Time for another Excel formula / Power Query challenge. This is based on a common business data analysis problem. Say you have two tables – calls log and office hours. Call log tells when each call is received. Office hours tell us working hours for seven days of the week. We want to know how many calls are outside office hours.

Count calls outside business hours – problem

So you are up for the challenge eh? Just follow the below steps.

• Download the problem data set.
• There are two tables. calls & working.hours.

You have three problems to solve.

1. Write a formula in calls table to identify if a call is outside office hours. Can be Yes/No or TRUE/FALSE
2. Write a single formula outside the tables to count how many calls were made outside office hours. The answer should be 693. You can use helper columns (or the column in problem#1) if you want.
3. Set up a Power Query to filter all outside office hours calls.

Successful in finding the answers? Please post them in comments.

If you have an answer, please post your formulas / VBA / M / spells in the comments area.

Want some clues? Try these – BETWEEN formula in Excel, Range lookup, Working hours problem

Of course there is a hidden answers worksheet in the download. So check that out if you feel stumped.

Want more problems?

Check out Excel homework and Excel challenges pages for some hard, interesting and fascinating problems to solve.

All the best. I am waiting for your answers.

The post How many calls we got outside office hours? [Excel / Power Query homework] appeared first on Chandoo.org – Learn Excel, Power BI & Charting Online.

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