I would like a formula to count the number of hours worked by various resources each month. What formula do I use to pick up the total number of hours that resource C works in January, February etc
DATE RESOURCE HOURS
01/01/14 C 5
05/01/14 C 8
14/01/14 A 9
14/01/14 B 10
20/01/14 C 11
06/02/14 C 9
09/02/14 C 4
13/02/14 A 7
16/02/14 B 14
23/02/14 C 15
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