This is the 66th most frequent Persian word.
تومان
"Toman" is a former Persian currency unit, now informally used to denote 10 Iranian rials.
In this sentence, 'تومان' (toman) indicates the currency unit referring to the money owned by the speaker.
من پنجاه هزار تومان پول دارم.
I have fifty thousand tomans.
Here, 'تومان' is used to mention the cost of an item.
قیمت این کتاب بیست تومان است.
The price of this book is twenty tomans.
In this usage, 'تومان' refers to the amount of money lent to the speaker.