For Nocomp, a monopoly company, the following information is available about demand, price and costs:

sales volume (quantity) 1 ooo 2 ooo 3 ooo 4 000 5 ooo 100 80 60 40 20 regular 20 ooo 20 ooo 20 ooo 20 ooo 20 ooo 20 ooo 40 000 80 ooo 120 ooo 172 ooo 340 ooo