5 - $16.50 $3.30 per item, includes $1.50 GST) 10 - $20.90 $2.09 per item, includes $1.90 GST) 25 - $42.90 $1.72 per item, includes $3.90 GST) 50 - $82.50 $1.65 per item, includes $7.50 GST) 75 - $126.50 $1.69 per item, includes $11.50 GST) 100 - $163.90 $1.64 per item, includes $14.90 GST)