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Can you help me out with my HW, it's attached, I don't know how to do any of it and the textbook is ambiguous with its formulas to figure out these totals

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Can you help me out with my HW, it's attached, I don't know how to do any of it and the textbook is ambiguous with its formulas to figure out these totals. Can you explain it as well next to each answer & calculations? Thank you. The questions are highlighted in yellow, with the specific amounts needed to be calculated underneath?