Answer
$\$ 8,689,406.25 $
Work Step by Step
We calculate the maximum acceptable bid by increasing the Architect's estimate by the percentage given in "maximum rate above estimate":
$$
5\% \times8,275,625+8,275,625=0.05 \times8,275,625+8,275,625=413781.25+8,275,625=\$ 8,689,406.25
.$$