In total it's just under 2 cups worth of dextrose...
200g sugar is 1 cup dextrose
30g sugar is 2 tablespoons dextrose
40g sugar is 2.5 tablespoons dextrose
100g sugar is 1/2 cup dextrose
In total it's 500g worth of cherries. If you were making say chocolate fudge it would be really no different dextrose wise cause it's the same amount of dextrose... not unless you eat all the cherries :) It's only once a year, a very big day, I'll be trying it out and will let you know how it goes, I think it's a nice adaption for family and I'm sure the kids will love their substitute xmas cake. I'm making them as gifts so i'll be cooking them in muffin pans.