Jim's Camera shop sells two high$-$end cameras, the Sky Eagle and Horizon. The demands for these two cameras are as follows: DS $=$ demand for the Sky Eagle, PS is the selling price of the Sky Eagle, DH is the demand for the Horizon, and PH is the selling price of the Horizon.

DS $=2230\mathrm{.}60$PS $+0\mathrm{.}35$PH

DH $=271+0\mathrm{.}10$PS $0\mathrm{.}64$PH

The store wishes to determine the selling price that maximizes revenue for these two products. Develop the revenue function for these two models. $($Enter your answer in terms of

PS and PH$.)$

revenue $=$

Find the prices that maximize revenue. $($Round your answers to two decimal places.$)$

$($PS$,$ PH$)=$