A softball bat was discounted 20% and sold for $120 including GST a) how much was paid by the customer B) what was the original marked price including GST?
+33661 a) Presumably the customer paid $120
b) If it was discounted by 20% then this is 80% (or 0.8) of its original price, so 0.8*original price = $120
Divide both sides by 0.8 to get original price = $150
+118723 Sorry Dragon, I forgot about your good question.
GST stands for goods and services tax.
This is a general tax on things that you buy and services that you use.
In Australia it is 10%. I think in New Zealand it is a little higher.
Not all countries have a GST so when people talk about things like this (in our international forum) they should really explain what they are referring to. 
