employer super deduction + gst = total

[kaseyb1997]

How does this work invoiced $4007.70, 9% super deducted $303.10, 10% gst $336.78, paid $4007.70 how does the calculations work

 

[tkhunny]

There's only two items. Try the three possible ways.

Unfortunately, we don't know the actual price of the item. All we know is the final invoice.

Actual Price = P

Both Discount and GST apply to total.

Discount: P*0.09 = D
GST: P*0.10 = G
Paid: P - D + G = 4007.70

Let's try the discount first, then apply the GST

Discount: P*0.09 = D
Subject to GST: P - 360.69 = S
GST: S*0.10 = G
Paid: P - D + G = 4007.70

Only one left. Add the GST and then apply the discount.

GST: P*0.10 = G
Amount subjec to to discount: P + G = T
Discount: T*0.09 = D
Paid: P - D + G = 4007.70

That may actually be illegal.

One of those should work.