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Cost Accounting – I




                    Notes          Solution:
                                           Re-order Level = Maximum usage × Maximum re-order period

                                                       = 420 units × 15 days = 6,300 units
                                          Minimum Level = Re-order level – Normal consumption × Normal re-order period
                                                       = 6,300 – (300 units per day × 12 days)
                                                       = 6,300 – 3,600 = 2,700 units
                                         Maximum Level = (Re-order level + Re-order quantity) – (Minimum consumption

                                                                                        × Minimum re-order period)
                                                       = (6,300 + 3,600) – (240 × 10)
                                                       = 9,900 – 2,400 = 7,500 units


                                          Example: From the following data for the last twelve months, compute the average stock
                                   level for the said component:
                                                                              Consumption
                                   Maximum usage in a month                   300 Units

                                   Minimum usage in a month                   200 Units
                                   Average usage in a month                   225 Units
                                   Time lag for procurement of material: Maximum – 6 months ; Minimum – 2 months.
                                   Re-ordering quantity:                      750 units.

                                   Solution:
                                           Re-order Level = Maximum usage × Maximum lead time
                                                       = 300 Units × 6 months
                                                       = 1,800 Units
                                         Maximum Level = [ROL – (Minimum usage × Minimum lead time)] + ROQ

                                                       = [1,800 – (200 × 2)] + 750
                                                       = 2,150 Units
                                          Minimum Level = ROL – (Average usage × Average lead time)
                                                       = 1,800 – (225 × (6 + 2) ÷ 2

                                                       = 1,800 – (225 × 4)
                                                       = 900 Units
                                     Therefore, Average Level = (Maximum level + Minimum level ) ÷ 2
                                                       = (2,150 + 900) ÷ 2
                                                       = 1,525 Units


                                          Example: Calculate Re-order level, Minimum level, Maximum level and Average stock
                                   level from the following data:

                                   Normal usage        300 units per week




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