Delivery Coupon
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Chef wants to order food from a app. He will order three items costing __A1__, __A2__ and __A3__ on the first day and three items costing __B1__, __B2__ and __B3__ on the second day. There is also __D__ delivery cost that is applied to both orders on each day. That is Chef will have to pay (__A1__ + __A2__ + __A3__ + __B1__ + __B2__ + __B3__ + __D__ + __D__) as total for his or
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solution.cppC++17
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