Projections are not only based on data but also on operations, products, people and process. There are couple tactics you can use without mapping a large data.

Other things you should look at are the people who execute behind your products because mostly they are the one causing sales problem, not the product or its data projection.
By implementing couple tactics you can figure out easily the product that sells most, your A players people, and implement a marketing strategy that sells.

Give me a buzz. We can set up together the process for you.