The Marketing Director of a pharmaceutical company wants to examine the effects of number of sales personnel, population density, the average sales calls made to the doctors in the region, and the average monthly sales calls made on the chemists in the region, on the sales of the pharmaceutical products of the company. She has six particular regions in mind where she wants to examine these effects. In order to do so, she plans to collect primary data. What are the different types of primary data that can be collected for this purpose. What are the pros and cons of collecting primary data for this purpose.