The estimated amount refers to the estimated buying or selling amount as calculated based on the order price and the nominal value. The estimated amount does not include transaction fees.
Estimated Buying/Selling Amount = Order Price * Nominal Value / 100 + Accrued Interest + Adjustment
Accrued Interest is calculated as a single bond's accrued interest * nominal value / 100.
Adjustment is 0 if the order is "valid within the day", and is a 9-day coupon payment if the order is "valid within one week".