this simalar to the other problem and i set the 2 equations S(p)=200-p+0.000007p^4 and and D(p)=1500-0.0004p^3 equal to each other and i smade it equal zero so it was 0.000007p^4+0.0004p^3-p-1300 it that right? because i graohed it and the answer is insanly hugmungo