160x45%x 1=72 (yuan) 160x30%x0.5=24 (yuan) 160x25%x0. 1=4 (yuan) 72+20

1. The coins issued by New China can be roughly divided into ordinary coins in circulation; Circulating metal commemorative coins, collecting precious metal commemorative coins. Among them, precious metal commemorative coins, commonly known as gold and silver coins, are expensive and have a small circulation. Due to political, economic and foreign exchange considerations, the state mainly focuses on exploring the international market in sales. At the same time, it also began to cultivate, based on domestic and national promotion. The "duty" of sorting coins is to act as a circulation intermediary. However, with the needs of collection and investment, some coins used for other purposes have been derived. Although coins have different classification standards.

2. Currency in circulation This is a coin in the original sense, which was issued for "circulation". Sovereign issuers put on the market at face value and circulate at face value in exchange for. Money is made of ordinary metals or precious metals; The circulation is unlimited and generally large; The issue age can be intermittent or continuous; Coins with the same denomination and design have different release dates. According to its practical use, it can be divided into "external circulation" and "internal circulation".

3. The purpose of issuing investment currency is neither "circulation" nor conventional "collection", but preservation and appreciation. The investment currency is a coin-shaped metal ingot made of high-quality precious metals (generally above 99.9%) with a fixed weight (such as 1/4 ounces, 1/2 ounces, 1 ounce). Although investment coins are also issued by sovereign issuers, they often have no face value or symbolic meaning (as "coins" recognized by sovereign issuers). The circulation and the year of issue are not important. The market form is relatively fixed and easy to identify (such as Canadian maple leaf silver coin and South African Kruger antelope gold coin). What matters is the fineness of precious metals and the weight of coins. Investment currency is just a precious metal in the shape of a coin, which is easy to store and trade (compared with gold ingots, gold bars, gold necklaces and gold rings) and can preserve and increase the value. According to its essence, this kind of coin can be translated into "Yuanbao" coin, but it is not popular; Because of its high quality, it should have been called "pure" gold and silver coins, but adding the word "pure" is a bit cumbersome. If it is called gold and silver coins for short, it is easy to be confused with gold and silver commemorative coins. So it is suggested that the name "(precious metal) investment currency" is still the best choice. In fact, the average coin collector will not set foot in this field.