Read the examples and choose the meaning of each idiom

I want to set up shop and sell flowers.
[be very expensive|do a lot of shopping|give too much money|start a business|talk about business]
This dress costs an arm and a leg. I don't have enough money.
[be very expensive|do a lot of shopping|give too much money|start a business|talk about business]
"Don't shop till you drop, Jenny. You already have too many things."
[be very expensive|do a lot of shopping|give too much money|start a business|talk about business]
If you buy this dress now, you'll pay through the nose for it. It's better to wait for a sale.
[be very expensive|do a lot of shopping|give too much money|start a business|talk about business]
He is always talking shop. Doesn't he have anything else to talk about?
[be very expensive|do a lot of shopping|give too much money|start a business|talk about business]