Complex sentence: Paula Jones was the project manager in the fourth week and made a "very good product" (as described by Sir Alan) however, she confused Cedar wood with Sandalwood, the latter being much more expensive and partly caused a major mistake.
Split into simpler sentences: Paula Jones was the project manager in the fourth week and made what Sir Alan described as "a very good product". However she confused cedar wood with sandalwood-the latter being much more expensive-and partly caused a major mistake.