There are 319 pages.
You have to create 400 copies.
That means we need total 319 times 400 pages.
Which is 127600 pages.
Cost of 1 page is not given so for now i'm going to assume that cost is $x per page.
Hence total cost for printing pages will be $127600x.
You can simply multiply 127600 with cost of 1 paper to know the exact amount.