What about Marketing & Sales?

Marketing make a strategy for the source of Income. It’s an activity, starting from an awareness, product and market research, targeted audiences, advertising to exchange the offering in terms of products or services for their satisfaction.

Sales, in accounting, refers to a company’s revenue earned by selling the products or services (net sales). In general business operations, sales refers to any transaction where money or value is exchanged for the ownership of a good or entitlement to a service.

Finally personal relation builds up business and sales.