The total page sums up the amounts from the other pages.

The goods amount  is the sum of the net values of all positions, that are not marked as containers. The Container amount is the sum of the values of all positions marked as such. The Total line amount is the sum of both.

The Total Charges / Allowances only contain values assigned to the whole invoice.

The Total Taxes is the sum of all taxes and fees applied to the positions. You'll find a more detailled summary in the list Taxes / Fees.