A/per

[Nima1000]

Could someone tell me whats difference between a and per?

For example:1.The eggs costs 2$ a dozen.2.The eggs costs 2$ per dozen.
(please give me simple answers,Because. I am learning English.thank you.)

[bhaisahab]

Could someone tell me what's the difference between a and per?

For example:1.The eggs costs 2$ a dozen.2.The eggs costs 2$ per dozen.
(please give me simple answers,Because. I am learning English.thank you.)

There is no difference in meaning.

[SoothingDave]

There is no difference in meaning between the two sentences.

There is an unspoken "for" in the first sentence. $2 for a dozen.

"Per" means "for each." So "$2 per dozen" = "$2 for each dozen."