"多少钱"用英语可以有三种说法:
"How much?"， 来源是英语中的"how" (多少) 和"much" (钱) 。例句: "How much does that shirt cost?" (那件衬衫多少钱?)
"What's the price?"， 来源是英语中的"what" (什么) 和"price" (价格)。例句: "What's the price of that book?" (那本书的价格是多少?)
"How much is it?"， 来源是英语中的"how" (多少) 和"it" (它)。例句: "How much is it for a cup of coffee?" (一杯咖啡多少钱?)