suggest round "@" numbers, in addition to percentages
Consider some "rounded" buying options for OCD people (which seem to have a high overlap with idle game players)
We already understand
@1000 to buy a total of exactly 1000 units. Suggest some of these to the player with buttons, like the percentage buttons we already have. Based on current count; ex. if you have 800 suggest
maybe also use the percentage you can afford - like, round "25%" up to the nearest roundish number; or even upcoming achievement thresholds. minimum is based on current count though.