The CPI takes a constant basket of goods and sees how the price changes from year to year. If the price of the basket of goods increases, then there is price inflation. If the price of the basket of goods decreases, then there is deflation.
Copper and tin mainly make up bronze but other elements include phosphorus, manganese, silicon and aluminium.
Bronze is an alloy consisting primarily of copper, commonly with about 12bronze that consists copper the addition other ingredients. Aluminum bronzes, containing up to 16 percent aluminum and small amounts of implements artwork made bronze, which is an alloy copper, tin, and, while brass copper zinc, bronze consisting naval brasses had 39.