I took the index of the words, converted the amount to binary, additional 3 zeros, calculated the sha256 digest, took the very first Element of the hexadecimal to convert it to binary, included three zeros to your 8 digits of your binary and got 00000010011 which interprets to 19 in https://bookmarkloves.com/story20795145/a-secret-weapon-for-bip39-words-to-numbers