3 Points 32) The company has the following information: Total Gross Margin (20%) Total Sale Value-Total Costs Main Product A Main Product B $40 $8 $32 $60 Final sales value of total production (Total sales) Gross Margin (20%) Total Costs $12 $48 Separable Costs $18 $12 Joint Cost? Under Constant Gross-Margin Percentage NRV method, Joint Costs for Product A and B are a) $30 and $20 b) $42 and $30 c) $36 and $24 d) None of them