Let the monthly expenditure angle for school fees is x, then that of housing will be 2x. Since the total angle in the circle is 360.

Using 90 as the angle for transport

So, x + 2x + 120 + 90 = 360

3x + 210 = 3605

3x = 360 - 210

= 150

x = $\frac{150}{3}$ = 50

So the angle for housing is 2x = 2 x 50

= 100

Amount spent on housing = $\frac{100}{360}$ x 7200

= #2000