In Arthur Miller's The Death of a Salesman, the salesman's wife says, "So, it was a dollar eighty". (Couldn't find page numbers. Please go to the sixth 'eighty'). If it means $1.80, I couldn't find any relation between what comes before and after it. What did I miss?
Yes, $1.80 is part of the $16.00, specifically the cost of the fan belt. As to "hope" and "wish"; "wish we didn't" would indicate something that happened in the past that is now regrettable. So I'm sure your thought is that since the purchase was in the past, that is when they got "stuck", so now they "wish" that hadn't have happened. But at the present time, they don't know if they were "stuck" or not, only the future will tell, so they "hope" that the future won't bring that knowledge. That is why "hope" is used. I have rewritten this three times and it still looks as clear as mud. I hope you can understand it.