Portofino Manufacturing Corporation Manufactures Three Products in a Joint Process

Portofino Manufacturing Corporation manufactures three products in a joint process.Additional information is as follows:
$$\begin{array} { | l | r | r | r | r | } \hline & \mathbf { J } & \mathbf { K } & \mathbf { L } & \text { Total } \\\hline \text { Units produced } & 16,000 & 4,000 & 2,000 & 22,000 \\\hline \begin{array} { l } \text { Sales value at } \\\text { split-off }\end{array} & \$ 300,000 & \$ 100,000 & \$ 20,000 & \$ 420,000 \\\hline \begin{array} { c } \text { Addition costs if } \\\text { Processed } \\\text { further }\end{array} & \$ 48,000 & \$ 20,000 & \$ 6,000 & \$ 74,000 \\\hline \begin{array} { l } \text { Sales value if } \\\text { processed } \\\text { Further }\end{array} & \$ 340,000 & \$ 160,000 & \$ 40,000 & \$ 540,000 \\\hline \begin{array} { l } \text { Joint costs }\end{array} & & & &\$ 120,000 \\\hline\end{array}$$ Required:
(a)Allocate the joint costs to the three products using the net realizable value method.(b)Determine which products should be sold at split-off and which products should be processed further.