Product X is sold for $8 a unit and Product Y is sold for $12 a unit. Each product can also be sold at the splitoff point. Product X can be sold for $5 and Product Y for $4. Joint costs for the two products totaled $4,000 for January for 600 units of X and 500 units of Y. What are the respective joint costs assigned each unit of products X and Y if the sales value at splitoff method is used?