The manufacturer of a certain item can sell all he can produce at the selling price of $60 each. It costs him $40 in materials and labour to produce each item and he has overhead expenses of $3000 per week in order to operate the plant. The minimum number of units that he should produce and sell in order to make profit of at least $1000 per week, is
A 200
B 250
C 300
D 400
E 500
A 200
B 250
C 300
D 400
E 500














