Twitchell Industries produces three products. All of the products use a furnace operation, which is a production bottleneck. The following data are available:Product $1$Product $2$Product $3$Unit volume$-$May$1,0001,5001,000$Per$-$unit data:Sales price$ $35$$ $33$$ $29$Variable cost$(15)(15)(15)$Contribution margin$ $20$$ $18$$ $14$Furnace hours$4$ hrs$\mathrm{.}3$ hrs$\mathrm{.}2$ hrs$.$Product $1$Product $2$The products are equally profitable.Product $3$