Using R$01111010,$ architectural fees are $8\mathrm{.}0$ percent of the building cost for a $$1$ million project and $7\mathrm{.}0$ percent for a $$5$ million project. Interpolating between the two percentages for a $$2\mathrm{.}5$ million project, the fee is about $7\mathrm{.}6$ percent.