How did they get 68.6?

c. Due to unforeseen delays, you don't enter the market. However, a year later the market supply has changed to Qs = 35P + 1410. Are you surprised at this shift in supply? Answer: ATC= TC/Q= 1100/Q+ 495-8Q+ 0.06Q^2=0 o dATC/dQ=-1100/Q^2 -8+0.12Q=0 o Q when ATC is minimum= 68.6 o ATC= $244.5 Since price is more than minimum ATC, it means firms are earning profit so supply will increase. So supply shift to the right isn't surprising. . Yes, it is surprising although AVC is too high, firms still entering and thus making supply high