Why is white-collar employment more significant in a postindustrial society than in a industrial society?

Hello, could you answer this question for me? if management wishes to know how well a business's inventory is moving, they could use the a. acid test ratio. b. inventory turnover. c. accounts receivable turnover. d. current ratio.

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mark, a civil engineer, entered into a contract with david. as per the contract, mark agreed to design and build a house for david for a specified fee. mark provided david with an estimation of the total cost and the contract was mutually agreed upon. however, during construction, when mark increased the price due to a miscalculation on his part, david refused to pay the amount. this scenario is an example of a mistake.