Un kilo de café cuesta mucho dinero.

Questions & Answers about Un kilo de café cuesta mucho dinero.

Why is it Un kilo and not Uno kilo?
When the number one comes directly before a masculine noun like kilo, uno drops the -o and becomes un. You only use uno when you are counting or when the word stands alone.
What verb does cuesta come from, and why does it have a 'ue' in it?
Cuesta comes from the verb costar (to cost). It is a stem-changing verb, which means the o in the middle changes to ue when we talk about a single thing like un kilo.
Why do we use mucho here instead of muy?
We use mucho (a lot of / much) because it is describing a noun, dinero (money). You use muy (very) when describing an adjective, like if you wanted to say the coffee is very good (muy bueno).
Why is kilo spelled with a 'k'? I thought Spanish usually uses 'c' or 'qu' for that sound.
You are right! The letter 'k' is actually very rare in Spanish. It is mostly used in words borrowed from other languages, like kilo or karate.

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