Greetings:

In the USA you can register a collection of songs as a single work for the same $35 as just one song. My advice is that you name your collection after one of your songs plus the words "and Other Songs." Then you list each individual song as an alternate title. For example, here is a collection of five songs:

Title: Jonah From Arizona and Other Songs

Alternate titles:
Jonah From Arizona
Broken in Hoboken
Rupert Murdoch's Rag
Good Grief, It's Daddy!
The Floozie's Blues

Net cost: $7 per song. Make it collection of 10 songs, and the cost goes down to $3.50 per song.

--- Steve