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.
According to the Boston Globe, the primary difference between bronze and brass is that bronze is made from the combination of copper and tin, while brass is made from copper and zinc. Both are copper alloys, meaning that they are mixtures that are in the solid state. Keep Learning.