You should do some reading into the economic theory of bundling.

While custom pricing gives the user the most freedom, it may be confusing, and you may make more money by bundling your services. The classic example of this is movie studios which, when selling movies to theaters, will bundle a hot blockbuster movie with a less popular movie. By bundling these two movies together, the studio ends up with a higher profit than if they sold both movies individually at a higher total price.

That is the important part: by selling goods as a bundle at a lower price than the sum of the prices of the goods sold separately, you can actually increase your total revenue.

Here is a good article to help you: http://livingeconomics.org/article.asp?docId=288

You should be able to use analytics to get a sense of the utilities that users place on each item within your larger product. From there you can construct the pricing of your bundles to maximize your profit.

Good luck!