Final answer:
The word 'Dollars' in the given sentence should not be capitalized as it is a common noun not at the start of a sentence or part of a title.
Step-by-step explanation:
The word in the sentence 'That'll be three Dollars and fifty-five cents, please.' that is incorrectly capitalized is 'Dollars'. In English, common nouns, such as 'dollars', are not typically capitalized unless they are at the beginning of a sentence or part of a title. The correct sentence should read: 'That'll be three dollars and fifty-five cents, please.'
In the sentence provided, the error lies in the capitalization of "Dollars." The corrected sentence is: "That'll be three dollars and fifty-five cents, please."
This revised version adheres to conventional capitalization rules, where currency denominations are typically written in lowercase letters. It's a common stylistic choice to use lowercase for general terms like "dollars" and "cents" unless part of a specific title or formal context.
Such precision in capitalization helps maintain grammatical consistency and readability in written communication. Additionally, adhering to standard writing conventions fosters clarity and understanding, making it easier for readers to comprehend and engage with the content.