Two types of plastic piping are produced in a joint production process. UB-1 may be sold immediately after split-off. UB-2 requires further processing before it is ready for sale. There is no opening inventory. The following production data are available: Total joint cost K80 000 Additional cost of processing UB-2 K38 400 Sales quantity (metres) sales price (metres) closing inventory (metres) UB-1 200 000 K0.30 8 000 UB-2 180 000 K0.40 12 000 Required: a). calculate the cost of closing inventory using the final sales revenue method of joint cost allocation to the nearest K100.