Ruling Weakness and Resistance

[scizorlicious]

If I attack a Pokémon that has both weakness and resistance to the card I am attacking with, how is it calculated?

For example, if I attack with Kecleon RR and get 2 heads on the coin flips (so 50, without W/R calculated) against Togetic UD, how much damage would it ultimately do?

 

[DNA]

You will calculate Weakness first. Then you calculate Resistance. If you do the math, the end result is 80 damage.