If a company produces phones and earns $32 million in sales but pays $24 million for the items sold, then the company's gross profit margin would be ($32M - $24M) / $32M = 25 percent.
Burning legs can result from a number of causes, including damage to nerves in the legs from exposure to extreme heat or cold or to toxic substances. Burning legs might also result from a circulation problem that impairs blood flow to the legs, a leg injury, or intense exercise.
1 Many causes of leg pain are obvious, such as injury after an accident. 2  Leg pain can have less obvious causes, such as peripheral artery disease. 3  Repetitive, excessive sports, especially in the form on running, can lead to trauma that creates leg pain-E.G: shin splints and stress fractures. Repetitive, excessive sports, especially in the form on running, can lead to trauma that creates leg pain-E.G: shin splints and stress fractures. 2  Leg pain with an underlying medical cause may be nerve-related, musculoskeletal or vascular.