A companys sports shoes sell for an average of $100 with a standard deviation of $9. The costs going into their sports shoes are as follows: Retail store costs and profits: average of $45 with a standard deviation of $5. Brand company costs and profits: average of $24 with a standard deviation of $4. Advertising and publicity costs: average of $11 with a standard deviation of $3. Assuming these various costs are independent of one another, what is the mean and standard deviation for the remaining costs R together (which includes materials, transportation, factory worker wages, etc.)?

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MeanR can be computed as Meantotal Meanretail Meanbrand Meanadvertising MeanR Substituting the ... View the full answer