Help! Led Strips - How To Connect Them?

[enjoylife 0]

Hello RT members,

I am looking for LED strips at 6m and 3m length each (for display shelves @ home).

The LED seller only sells LED strips in 5 m per roll.

I will need to buy two rolls (5 + 5 m).

And I need help to connect the LED strips into 5 + 1 m (6 m) and cut the other to size (3m).

Where can I get such services and how much is the cost?

Any shops to recommend?

Also, where to buy cheap and good LED strips?

Thanks!