Economic batch Quantity:
1. 
EOQ = √ 2AB / CS
EOQ = √ 2AB / CSA = Annual consumption in units B = Buying cost per order
C = Cost per unit S = Storage & carrying cost per annum.
2. 
EOQ = √ 2UO / C
EOQ = √ 2UO / CU = Usage in units per annum O = Ordering cost
C = Cost of inventory carrying cost per unit in year.
3. EOQ = √2CO / I
EOQ = √2CO / IC = Consumption of the material in units per year O = Ordering cost I = Interest & other carrying cost per unit / annum.
4. 
EOQ = √2AB / S
EOQ = √2AB / S A = Annual consumption in units B = Buying cost per order
S = Storage & carrying cost per annum.
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