3 Boxes of 40pc Quantum Dishwashing tablets = 120 tablets
Free postage.
You can buy as many packs in qty of 3 as you want.
Not quite as good as some of the better specials, but still good compared with regular supermarket prices.
Recent specials listed on OzBargain:
Finish Quantum 20pack $7.49 (Save $7.50, 50% off) .38ea (Ended 24 April)
Finish Quantum 40pack $20 (Save $6.99, 26% off) .50ea (Ended 19 June)
Current prices:
Woolworths 40pk $29.01 .73ea
http://www2.woolworthsonline.com.au/Shop/ProductDetails?Stoc…
Coles 40pk $29.28 .73ea
https://www.colesonline.com.au/webapp/wcs/stores/servlet/Pro…
Cudo currently offers Finish Classic Powerball 360 tablets for $99 delivered = 27.5c each.
http://cudo.com.au/rest-of-australia/get-360-finish-classic-…