Of course, the cost of providing delivery by a single firm could also be compared with the cost of three or more firms.
Obviously, you could compare the cost of delivery by a single firm to that by multiple firms.
There is no way to compare delivery costs.
There are two sides that one can take.
Hope there is no doubt towards you.
The students are working on the computers.
I can get off at the park if you take me there.
The boys are running.
A group of men are in hockey uniforms.