Shawn is making a meal. It will cost $1$ minute for preparing the vegetables, $2$ minutes for washing the pan for oven, $6$ minutes for the oven roasting the meal, $2$ minutes for cleaning the table, and $1$ minute for putting the meal on the table. At least how long will it take for Shawn to finish the meal? 
Overseas Competition->Knowledge Point->Combinatorics->Time Problem
Shawn can clean the table while the oven is working, so it will take $6$ minutes in total. So, he can finish the meal in $1+2+6+1=10$ minutes. 