Solving applied density problems

Ivan, a scheduler at Mangel$-$Wurzel Transport, gets a call from a regular customer needing to move $15\mathrm{.}8m^3$ of rock and soil, which Ivan knows from previous experience has an average density of $300k\frac{g}{m^3}.$ Ivan has available a dump truck with a capacity of $8m^3$ and a maximum safe load of $5200.kg.$

Calculate the number of trips the dump truck will have to make to haul the customer's load away.