Hello Ali,
Thanks for the update.
I believe every flat pays the same maintenance cost. Then why is the amount received varying for every month?
A suggestion is to have another row in your spreadsheet which shows the expected inflow of maintenance charges. eg. Rs. 1500 x 40 = Rs. 60000
The rest can remain the same.
By the way, I have transferred the maintenance balance to Deepak and he should hand it over to you shortly.
Happy Dussehra to you and your family.
Regards,
Ajith Damodar