A company makes two products,X and Y,on the same type of direct labour and production capacity per period is restricted to 60,000 direct labour hours. The contribution per unit is $8 for product X and $6 for Product Y.The following constraints apply to production and sales: x ≤10,000 (Sale demand for Product X) y ≤12,000 (Sales demand for Product Y) 5x+4y ≤60,000 (Direct labour hours) The contribution-maximising output is to produce and sell 10,000 units of Product X and 2,500 units of Product Y. What is the shadow price per direct labour hour and for how many additional hours of labour does this shadow price per hour apply?