Nice pattern. Your colorful, cheerful yarn should make for an interesting FO. I didn't look, as Ingrid did, at the yarn and prices but when I read what she wrote - ! OMG who do they think can afford a cushion at that price.
I should never overestimate my basic arithmetic skills.
I think that's going to work out beautifully with the yarn you have chosen. With a lot of cable patterns I have seen, they work out best with a solid color yarn. This is a cable pattern that works really well with a variegated yarn, more of a textural stitch. I love what I have seen thus far and look forward to seeing your finished project!