In excel how to make the sum of the different projects?

Users questions: I want to EXCEL in contract, contract date, contract number, is doing a sum of different projects. Drugs such as picture in the contract sum is to have several contracts, contract number is the sum of several contract number? Prayer request!
Experts answer: refer to the following formula: = COUNTA (A1: A10 ) A1 is the first, A10 is the last requirement and the region.
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