Please help

Karen Powell makes three different silverware - spoons, forks and knives. Each unit (dozen) of spoon gives her a profit of $11.50, forks of $18 and knives of $17.50. She has 183 hours of machine time, 250 hours of labor and 185 pounds of steel. It takes her 4 hours of machine time, 4 hours of labor time and 3 pounds of steels to make one unit of spoons. Each unit of forks take 4 hours of machine time, 9 hours of labor time and 2 pounds of steel, while knives take 5 hours of machine time, 5 hours of labor and 4 pounds of steel. It is also found that she should make at least 15 units of spoons in the process. Solve the following linear program The solution is x1= ,x2=,x3= , with an objective value of The resources that are used up are: If it was decided that at least 20 units of spoons should be made instead of 15 , what impact does it have on profits