The estimated amount refers to the estimated buy amount and the estimated sale amount based on the order price and nominal value. The estimated amount does not include transaction fees.
The Estimated Amount for Buying / Selling Bonds = Order Price*Nominal Value / 100+Accrued Interest+GTD Adjustments
Accrued Interest refers to a single bond's accrued interest on the day*nominal value / 100.
When the order is "valid on the day", the adjustment is 0. When the order is "valid within one week", the adjustment is the 9-days coupon corresponding to the order.