Yes. The screenshot in the above post was actually from 'Round on each line' method. 'Round on total' method displays the same as 'Round on each line' in this example. 'Round on each item' is different but the way it's done doesn't serve us because everything is rounded, tax added per item and rounded and at the end multiplied by quantities . The calculations are as follows:
Rounding mode: Round on each item
Product base price: £0.30
Discount applied at 1000pc: -31%
Price after discount excl. VAT: £0.207, rounded to £0.21
20% VAT applied to each item: £0.21 * 0.20 = 0.042, rounded to £0.04
Item price, incl. VAT: £0.21 + £0.04 = £0.25
Total for 1000pcs: £0.25 * 1000 = £250
