In the first sentence the subject (the main noun) is “shirt,” and $60 is an adjective. (Adjectives describe nouns)
If an amount of something, money, years, etc. is used as an adjective, it doesn’t get an S.
“He is a 12 (twelve) year old boy.” (the main subject is boy) not years
“I have a 5 (five) year contract with my company.” (the main subject is contract) not years
“I eat usually lunch at my office because I only have a 45 (forty five) minute lunch break.” (the main subject is lunch break) not minutes
Dollars, years, hours, minutes are all countable nouns, that means if there is more than 1 dollar or more than 1 year we need to add an S on the end. (I have 5 dollars. He has lived in Toronto for 2 years.)
Remember that in the first example sentence $60 is not a noun, it’s an adjective, the main subject is the noun shirt. If you look at our second example sentence the main noun is the price of the shirt, $60.00 ~ so we say sixty dollars.
“That boy is 12 years old.”
“My contract is 5 years.”
“I usually eat lunch at my office because my lunch break is only 45 minutes.”
|Please be careful, this is a $300,000 car!!!|