Nanci, what you're talking about is a kilojoule...
Lise, probably the back of the TimTam packet is talking in kilojoules too. There's about 10 of them in a "calorie" (which I think is actually a kilocalorie, but is never called that in the nutrition wold..?), so each bicky probably has 30-or 40-something calories.
Wait!

I've lied:
1 Calorie [nutritional] = 4.186 8 kilojoule
1 kilojoule = 0.238 845 897 Calories [nutritional]
So:
390 kilojoule = 93.149 899 685 Calories [nutritional] (Thank you
www.onlineconversion.com)