多少钱【duōshao qián】

多少钱 asks a price. It goes straight after the thing being priced, with no verb in front of it.

zhè ge这个shì是duō shǎo多少Qián钱 is possible but heavier; the bare form is what people say.

The units

块 is the yuan, 毛 is a tenth of it, 分 a hundredth. 元, 角 and 分 are the written forms that appear on receipts and price tags.

The last unit drops when nothing follows it: 三块五 is understood as 三块五毛. 钱 drops too once the subject makes it obvious that money is involved: 这本书多少？

Price per unit

The price of one unit takes 一 plus the measure word, either before or after 多少钱.

If the price is too high, 太贵了 and 便宜点儿吧 come next.