Fill in the blank with appropriate vocabulary

Hi Arya, let's solve this vocabulary question together.

First, let's look at the dialogue. Peter explains that space hotels will open in thirty years, but it will cost one hundred thousand dollars for just three days.

Jack's reaction is key. He repeats the amount, says definitely not, and then says he will never pay that blank.

We need a noun that refers to the money mentioned, which is one hundred thousand dollars. Let's look at our options.

Option A is brain, which refers to the organ in your head. That doesn't fit the context of money.