Let x be total \(\frac{items}{week}\),
Selling Price (SP) will be 60x,
Cost Price (CP) will be [40x+4000 (extra 1000 for profit)]
So,
40x + 4000 = 60x
20x = 4000
x=200.
The number of units he should produce and sell in order to make a profit of at least \(₹\)1000 per week is 200 So the correct option is (D)