Yarn:

You will need 11 x 50g balls of yarn.

Additional items:

Cable needle.
3mm crochet hook.
6 buttons.

From the pattern description:

Flattering slightly fitted and with a pretty crochet picot edging, this V-neck cardigan, with an intricate cable panel on each front, will be much admired.

The cable panels are intricate and you need to keep the pattern correct while shaping the fronts.