A vertical pipe, closed at the bottom end, is filled to a depth of $1\mathrm{.}00$ m with water and then an amount of oil of density $0\mathrm{.}800{10}^{3}k\frac{g}{m^3}$ is added to make the total depth $2\mathrm{.}00$ m $.$ The oil and water don't mix with the oil floating on top of the water. What is the increase in pressure at the bottom end of the pipe as a result of adding the fluids?