There is a high cost to running the infrastructure behind the cash economy-atms, vans carrying notes, tellers who accept coins.

运营现金经济背后的基础设施成本很高——自动取款机、钞票运输车、接受硬币的出纳员。

I gave the teller a note asking her to hand over 300 bucks.

我给出纳员一张纸条，要她交出300多块钱。