served at prices in-line with other offerings

[Maybo]

Egg mayonnaise, house-made terrine, mussels and French fries, or sausage with mashed potatoes are all made with 90% local ingredients and served at prices in-line with other offerings in the area.
(The exodus of Paris' chefs to the countryside by Emily Monaco)

Why do we need "-" between "in" and "line"?

 

[SoothingDave]

We don't.

 

[emsr2d2]

It's sometimes used when "in" and "line" are used as an adjective. For example "She loves in-line skating". Having said that, most people write "inline skating".

In the original, it's not an adjective, so it should simply say "... served at prices in line with other offerings in the area."

 

[Rover_KE]

The “-“ is called a hyphen.