Countifs doesnt work


in the following table every line within revenue is an order.
I want to count the number of orders for the first month except the order for customer C.

How can i do that? countifs doens return an error

month      revenue      Extra      customer
1       € 10,00        € 5,00       a
1       € 20,00        € 2,00       a
1       € 25,00        € 4,00       b
1       € 40,00        € 5,00       c
2       € 50,00        € 1,00       a
2       € 1,00        € 66,00       a
2       € 4,00        € 32,00       b
2       € 182,00        € 2,00       c
Hans de JonghAsked:
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Bill PrewIT / Software Engineering ConsultantCommented:
Assuming the data you showed started in A1, then how about this?


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Microsoft Excel

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