“A classic bright blue mohair cardigan is made yet more fashionable by the addition of a contrasting knitted braid which can be worn to suit. The matching cap has its trim sewn to it.”

Pattern suggests a mohair yarn.
300gm for the cardigan +
25gm each extra colour for the plait.

Gauge is using 6mm needles over stocking stitch.

The hat calls for 25gm for the hat + 25gm each for the extra colours. Average size head