This represents the percentage of each dollar of a company's revenue available after accounting for cost of goods sold. 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.
The causes of burning feet are numerous and varied, ranging from simple fatigue to more serious conditions such as a nerve damage or circulatory issues. Therefore, the underlying cause should be diagnosed as soon as possible to avoid long-term damage and morbidity.
Another common cause of burning feet is athlete's foot fungus. Some less common causes include alcoholism, chronic kidney failure, peripheral arterial disease, tarsal tunnel syndrome, Morton's neuroma, vitamin deficiency, HIV or AIDS, complex regional pain syndrome, and gastric bypass surgery.