Does the monthly dipping also account for any “shrink” from the techs working on their own cars or side jobs when the shop is closed for the day?We have Mototcraft 5w20 blend, 5w30 blend, 10w30 diesel and 0w20 in bulk as well as Castrol Magnatec 0w20. The tanks range from 120gal to 300gal. I just got a shipment today actually. The techs get the oil filters from parts and we bill out the quantity on the RO. I dip the tanks on the first of the month and anything short gets billed to service. Anything else is bottled, and boy do we have a lot of bottles.