What is Cost of goods sold? How it affects in the Gross Profit or Gross Loss?

Cost of goods sold (COGS) are the direct costs attributable to the production of the goods sold by a company. This amount includes the cost of the materials used in creating the good along with the direct labor costs used to produce the good. It excludes indirect expenses such as distribution costs and sales force costs. COGS appears on the income statement and can be deducted from revenue to calculate a company's gross margin. Also referred to as "cost of sales.

direct costs attributable to the production of the goods sold by a company. This amount includes the cost of the materials used in creating the good along with the direct labor costs used to produce the good. It excludes indirect expenses such as distribution costs and sales force costs.

if  it is  over the sales revenue will  as loss ,effected negative , the reverse will be if being , less than revenue   

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COST of goods sold is the accumulated total of all costs used to create a product

or a service which has been sold It excludes indirect expenses 

If the cost greater than revenue the result is a loss and vice versa