If we want to insert the appropriate functions, we can know the operation, for example, it could be a sum, multiply, average or only divide, but if we want to apply for a format number like accounting number, we must go to the tab home and the section number, we can change the format number, an accounting or even text format.
A dollar sign after both the letter and the number for each cell reference you want to keep the same will keep it the same when using the fill down/across function.
