Chemistry problem-photons?

The UV light that is responsible for tanning the skin falls in the 320 to 400 nm region. Calculate the total energy in joules absorbed by a person exposed to this radiation for two hours. There are 2.0 × 1016 photons of light in this UV range hitting the Earth’s surface per square centimeter per second. ume the exposed body area is 0.45 m2 and only half of the radiation is absorbed, while the other half is reflected by the body. (Hint: Use an average wavelength of 360 nm in calculating the energy of the photon.)