Possibly one of the most powerful easy to use formulas in Excel is the SUMIF formula.

It is very easy to use once you get your head around its syntax and it is extremely useful in all sorts of scenarios.

Here is the Microsoft Excel Explanation.

You use the

SUMIFfunction to sum the values in a range (Two or more cells on a sheet. The cells in a range can be adjacent or nonadjacent.) that meet criteria that you specify. For example, suppose that in a column that contains numbers, you want to sum only the values that are larger than 5.Syntax SUMIF(range, criteria, [sum_range])

I will explain that below more simply.

First let me explain some common scenarios where you might use SUMIF. Hopefully from there you can envisage similar scenarios for your own circumstances.

You have a list of names and values – maybe pays or scores or totals of times you beat them in darts matches or numbers of volunteers in each division or county. When the names appear more than once – e.g. you might have several different staff categories in each store across each state as per the example below.

Lets say you want to sum the total number of Part Time Employees in South Australia across all stores.

I am going to show you a summary table below this one that provides all the results for each staff category for each State and then explain how this was done using one simple formula. An understanding of ABSOLUTE and RELATIVE references is important.

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The AND function takes each of the conditions inside the brackets and evaluates for their truth, and then multiplies the results together. TRUE = 1 and FALSE = 0. So if any condition is FALSE then the overall statement returns FALSE.

The formula for AND needs to be placed in brackets with each of the conditions separated by a comma. For example =AND(H1<1,G1>1)

In this instance the function will evaluate H1 to see if the value is less than 1. if it is then it will return TRUE or 1 and if not FALSE or 0. Then it will do the same for G1.

The two values are multiplied together and the answer is then either 1 or 0, TRUE or FALSE.

The Excel Help says:

One common use for the

ANDfunction is to expand the usefulness of other functions that perform logical tests. For example, theIFfunction performs a logical test and then returns one value if the test evaluates to TRUE and another value if the test evaluates to FALSE. By using theANDfunction as theargument of thelogical_testIFfunction, you can test many different conditions instead of just one.

I had an interesting question about conditional formatting posed in the comments by Stephen.

In a new sheet, I am trying to make a whole row turn red, green or amber depending on the value of one cell in that row, so I can easily see which jobs we have won, lost or are pending. Any 'IF' conditional formula I write gets thrown out by Excel. What am I doing wrong?

I promised him an answer so here it is.

For this exercise I am making some assumptions.

- You are using Excel 2007 format Excel spreadsheet (.xlsx or .xlsm). These instructions will not work in detail for Excel 2003, though the concept is similar.
- That there are 3 conditions we are looking for. Of course Excel 2007 allows more than 3 conditions so you can add more if you need. (One of the improvements on Excel 2003 that only allowed 3 rules)
- That the entire row is needed to be coloured. If you need a smaller section than change the formulas accordingly.
- That the entire worksheet needs this formatting. If you need a smaller section than change the formulas accordingly.
- That the conditional formats are going to be based on a cell that returns a specific result based on some other rule.

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