Price Variance. Definition: Price variance is the actual unit cost of a purchased item, minus its standard cost, multiplied by the quantity of actual units purchased. The price variance formula is: (Actual cost incurred-standard cost) x Actual quantity of units purchased. = Price variance. If the actual cost incurred is lower than the standard cost, this is considered a favorable price variance.
Calcium carbonate is a common, naturally occurring calcium salt that is often used as a source of calcium in supplements. Its abundance in nature makes calcium carbonate the least expensive supplemental calcium salt. It is also a major component of some types of stone that are used in architecture and sculpture.
Calcium carbonate is the most common calcium compound. Calcium also occurs as a component of the natural compound gypsum, which forms plaster of paris when heated. It is also a component of calcium cyanamid, a fertilizer and progenitor of other nitrogen compounds.t is present in dairy products, almonds, leafy greens, sardines and salmon; proper absorption of calcium hinges on appropriate acidity of the stomach, presence of vitamin D and a balance of other minerals, including phosphorus and mangesium.