Sure. I updated the original comment to include page numbers. I also suggest watching the video lectures. He covers this topic in his 10th lecture on the course based on the book.

I’m still thinking about this, now that I revisited the topic, but I think it’s fair to say that prices of commodities are ‘composed’, on average, of 85% labor costs. The reason I’m not entirely sure is because it’s different to say that something deviates by an amount, and that one quantity is 85% of another. However, statements from his book like the following make me think it’s fair to use the ‘composed of’ meaning: “In this metric the distance between market prices and direct prices is about 15%, that between prices of production at the observed rate of profit and integrated labor times is about 13%, while that between market prices and production prices at the observed rate of profit is once again about 15%.” (Shaikh 2016, 439)