While it is not uncommon for the precise source of chest wall pain to remain unknown, some possible causes of costochondritis include: 1  Injury or trauma: Pain within the area of the chest wall may emerge as the result of a direct blow or injury to the area. Arthritis: Some evidence has suggested that symptoms of costochondritis are associated with degenerative joint conditions, such as osteoarthritis or rheumatoid arthritis.
In retail, unit price is the price for a single unit of measure of a product sold in more or less than the single unit. The unit price tells you the cost per pound, quart, or other unit of weight or volume of a food package. It is usually posted on the shelf below the food.
Unit price contracts are those contracts where the vendor (or contractor) bills the client (or the owner in construction projects) by the unit of work. The unit of work can be the following: - An hour: For example, the vendor bills the client for $70/hour of work done.