Chick-Thai is the only store sells chicken sandwiches around Santa Barabar, where the inverse demand function of chicken sandwiches is p(q)=50-5q. The cost function of the chicken sandwiches is C(q)=\frac{q^2}{2}+16q+10. After the protest from the angry crowd, the government decides to grant a $3 subsidy for each unit of sandwiches sold. By how much will the price of chicken sandwiches change after the subsidy? Round your answer to 2 decimal points. (If you find the price will increase by 5 dollars, put in "5"; if you find the price will decrease by 3.15 dollars, put in "-3.15".)