Hello Jarindr,
It is difficult to make oneself and opinion and judge about correctness in presence of only partial information. To get detailed information, you should go to
Billing. Select the billing account, then go to the History page.
Only billing administrators can view the transaction history. No paper invoices are sent to the billing contact.
The transaction history shows all account activity related to resource charges and payments. The report uses the US Pacific timezone. There are daily and monthly charges. You should check available information in its entirety on the Billing page, so correlations between items become visible, and an explanation for this apparently unjustifiable numbers becomes apparent.