Joint cost allocation; sell or process further

In a joint process, Wear Art produces precut fabrics for three products: dresses, jackets, and blouses.

a$.$ What amount of joint cost should be allocated to dresses and blouses?

b$.$ What is the sales value at the split$-$off point for dresses? $ $812,000$

c$.$ Should any of the products be processed beyond the split$-$off point? Show computations.