The Economic Batch Quantity (EBQ) is calculated using the formula:
\[EBQ = \sqrt{\frac{2DS}{C}}\]
where:
D = Annual demand = 18,000 units
S = Setup cost per batch = ₹ 220
C = Carrying cost per unit per annum = 10% of ₹ 1,250 = ₹ 125
Substituting the values:
\[EBQ = \sqrt{\frac{2 \times 18,000 \times 220}{125}}\]
\[= \sqrt{\frac{7,920,000}{125}}\]
\[= \sqrt{63,360}\]
\[= 251.71 \approx 252 \text{ units}\]
The Economic Batch Quantity is 252 units. This indicates the optimal batch size to minimize total setup and carrying costs.