Given: (x is number of items)
Demand function: d(x)=4107x\displaystyle {d}{\left({x}\right)}=\frac{{4107}}{\sqrt{{{x}}}}
Supply function: s(x)=3x\displaystyle {s}{\left({x}\right)}={3}\sqrt{{{x}}}

Find the equilibrium quantity:   items

Find the consumers surplus at the equilibrium quantity: $