dev60

I have a Jandy DEV60. Looking at the manual, page 9 Table 2 it states: Model No. DE Quantity (lbs.) DE Quantity (kg.) No of 1 lb. Coffee Cans DEV48 5.0 2.0 10 DEV60 6 2.7 12 Am a bit confused about understanding the table. It appears I should use 12 1lb Coffee Cans to coat the grid...