Do you find any grammatical errors in this sentence?

Question:-------------------------
The total fee of the previous localization service is USD 450,- while the current service is USD 530. So, the total fee will be USD 590.

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Answers:
The total fee of the previous localization service was $450 . The current service is $530 USD. The total fee will be $590 USD.

(errors include punctuation, and verb tense)

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i dont think there should be a period before "so" just a comma will do

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Just the hyphen after the 450, - it shouldn't be there.

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fee of the previous localization service WAS USD 450

makes more sense...was.is...will be

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The total fee for the localization service was $450. The service has now been raised to $530. So the total fee will be $590.

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