A=441 quater note = 80
String crossing may be difficult at the beginning, so try practicing this way 🙂 :
You can lift 3rd finger when you play open A string while practicing first two measures.
You can life your 3rd finger when you play Gs, too, while practicing 3rd and 4th measures.
There are 3 different tempi, so you can use the one you feel comfortable.
Eventually, you should be able to play with all the tempi comfortably. 🙂