Super, that is great information. I can deal with this now.
You did not get a 1099 because they are not required to give you a 1099 unless they pay you 600 dollars or more.
I do understand that you wish to capture the expenses of setting up business and so you need to file a schedule C. You claim the income of 50 dollars, and when you apply expenses, you will have a net business loss.
Since you do not maintain an inventory, you most likely do not have a cost of goods sold entry. The reason is that you would back out any labor costs for selling.
It may look odd, but in network marketing it is not unusual for a person to not have a cost of goods sold entry.
If the customer paid you for the product, and then you paid the source a price for the product, then what you paid would be considered part of the COGS. But in this case, the customer pays the source directly, and you collect a commission. Hence, no COGS.
If you counted as income all that the customers paid to the source, then you could list a cogs which would be what the customer paid minus your commission, but that is not how these transactions are set up.
What you describe does not appear to be of a nature to require a COGS. Essentially, you are in to direct sales. (another phrase to describe network marketing).