re: Victorian Sponge Cake

I’m fairly new to the baking world, I’ve done things for awhile, but still needing to adjust to the different ways of measuring that I’m finding on recipes. I’m needing a sponge cake to test out and practice on and found yours. You have your butter, sugar and flour in grams. How much in Cups for the flour and sugar and can you use stick butter? if so on the butter – how many sticks? Does it matter if the butter is salted or unsalted?