12P5 means to do a permutation, or nPr, where n is the total number of options and r is the options wanted. All you have to do is plug it in to your calculator and you get 95,040.
If you'd like to do the work, here's how:
[tex] \frac{12!}{(12-5)!} \\ \frac{12!}{7!} \\ \frac{479001600}{5040} \\ 95,040[/tex]
Hope this helps!