Purchase price: 10m2 (R30.00, 200 ml volume); 100m2 (R300.00, 2 litre volume). This is sufficient for one monthly application How to order: Simply calculate the size of the area you are maintaining eg. 30m2 and then order 3 x 10m2, or 300m2 and then order 3 x 100m2, and so on. Your Compost Extract will be specially packed to accommodate your specific size. Note 1 acre = 4500m2.Compost Extract (CE) is used in conjunction with Trace Elementals all through the year to inoculate your garden with micro-organisms and electrolytes. This is to keep it in a perpetual flux of building soil from the Supercharge materials.