Florida issues license plates in which the first three and last slots are filled with letters, and the fourth and fifth are filled with digits. Thus, there are \(26^4 \cdot 10^2 \) Florida license plates possible. North Dakota, however, issues license plates in which the first three slots are filled with letters and the last three slots are filled with digits. There are thus \(26^3 \cdot 10^3\) possible North Dakota license plates. Multiplying these out and taking the difference yields an answer of \(\boxed{28121600}\).
+122 
