Please add the use of mathematics (collection - subtraction - multiplication ...) in the tables without reference to other programs such as Excel, this is needed when designing the examination schedules for schools, to count the final grades of students, and you Muna very thankful
A better option would be to make it so you can live link to spreadsheet file (like image or incopy story links). That way you can do your calculations in a program intended for that use.
It would also have the added benefit that the spreadsheet can be generated and updated by a client or team member, and simply refreshed in indesign.
You can try Calculs Raynaux here :
Susie Blatchford commented
This would also be valuable to me as I use Indesign to create my invoices as I haven't yet found another program that allows me to create a good-looking invoice!