Hi Edmunds,
- Plus/minus are usually there by default, and can be customized by most themes and/or some CSS, the plugin doesn’t control that (it can replace them with dropdown to be precise, but that’s not the point here)
- I suggest you set the price per KG, and then sell using decimals (0.1, 0.2 kg), this is doable in the plugin, just enable Decimal in General tab, and then use the desired minimum & step quantities in the respective tabs/products pages.
The wrong price appears here because when you set 3 eur with using gram as base unit, it treats 200 grams as 200 of that unit, resulting in that wrong price.
Please let us know if you more help is needed.
Omar