Galaxy S3 Screen and Digitizer Broken

[AC Question]

So today I dropped my Galaxy S3 phone, and now the screen is badly cracked, and won't display anything. My phone is still able to boot normally and receive calls, but the screen is completely dark and I can't pick up the call. I have no clue what to do about this. I'm not sure what a digitizer costs, but I found a screen repair kit on amazon for 18.99$. What should I do?