The best thing to do with data such as sales over the last year of the top 1000 customers would be to answer questions like:
1) what products sell the most: This would help the marketing department,for example on targeting what items to push.
2) what groups of people buy what product: Again this would be targeting who buys what. We may discover that males prefer product A and females prefer product B. Or young customers prefer different products that older. This would help marketing also on targeting sales.
