Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to buy euros online [title] Watch the exchange rate between the euro and the currency used in your country. [step] You want to be able to buy as many euros as you can. Look up the current exchange rate and find out whether the rate is falling or rising.

Ending1: Also check the average exchange rate of currency (variable rate exchange rate) for your country. [substeps] For example, in the united states, there is an exchange rate of between 100 and 110 cents, while in the uk you can buy euros from usd. Ending2: [substeps] Check the expiration date of each euro you purchase to determine the exchange rate. You must be very wary of " good " or " low. Ending3: It may be helpful to look at a graph for the last few months to see how the euro is performing against your currency. [substeps] Determine which currency is being used to calculate the exchange rate; this is called the base currency. Ending4: Also, look up the exchange rate in another country if you live in that country. [title] Decide who you want to use the euros for.

Answer format: ending1/ending2/ending3/ending4