mass of integral in spherical coordinates

I am suppose to find the mass of the solid region W given in spherical coordinates by

roe greater or = to 0 and less than or = 3

theta between 0 and 2 pi

phi greater than or = 0 and less than or == pi/4

The density is density(P) at any point P is given by the distance of P from the origin

I know that I set up a triple integral and multiply my function by roe^2 sin(phi) but how do I express my density at any point????

Thanks to all of you for all of your assistance this term! Frostking