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Theequationfortotal cost functionisC(x)=100+270xThecalculationis as follows:Variable cost per board =total cost per day-fixed cost per day ÷ daily outputHeretotal cost per day is $5,500fixed cost per day is $10020 boards are produced per daySo,variable cost per board=($5,500-$100) ÷20=$270 per dayNow the equation isC(x)=100+270xLearn more:brainly.com/question/13981855?referrer=searchResults...