Emily wants to have her resume printed. The printing company charges $29.50 for the first 200 resumes, and then a flat rate for each additional 100 resumes. Emily pays $72.50 for 400 resumes ASAP

The flare rate for each additional 100 resumes is $21.50 and $43.00 altogether

$72.50-$29.50=$43.00

So the 200 additional resumes cost $43

Which means if divide her remaining balance of $43.00 by 2(because she had to pay the flat rate twice for the additional 200 copies)

43.00/2 = $21.50

If you are asking what the additional flat rate is for the extra 200 resumes the answer is $21.50 each