The cost of the geography books is 35 * 10.5 = $<<35*10.5=367.5>>367.5.
The cost of the English books is 35 * 7.5 = $<<35*7.5=262.5>>262.5.
The total amount of the order is 367.5 + 262.5 = $<<367.5+262.5=630>>630.
#### 630