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 (CAC401,CAC406). Bronze is an alloy of copper to which tin, zinc and lead are added to achieve particular physical properties. Historically, it was the first metal used for casting. Brass is an alloy of copper and zinc.ronze (CAC401,CAC406). Bronze is an alloy of copper to which tin, zinc and lead are added to achieve particular physical properties. Historically, it was the first metal used for casting. Brass is an alloy of copper and zinc.