YOU SAID:
Unused shipping costs are coming from the oven on my window
INTO JAPANESE
未使用の配送料金は私の窓のオーブンから来ています
BACK INTO ENGLISH
Unused shipping fee comes from my window oven
INTO JAPANESE
未使用の配送料は私の窓のオーブンから来る
BACK INTO ENGLISH
Unused shipping fee comes from my window oven
That didn't even make that much sense in English.