Spending/Upgrades/Economy/IncomeUpgrade.cs
namespace PlanetMeat;

[Title( "Economy Upgrade - Income" )]
public sealed class IncomeUpgrade : IntAggregateUpgrade<AccountIncome>
{
	protected override ValueAggregator<int> FindAggregate => TargetComponent?.AggregateIncome;
	public override double NextCost => Progressions.ExpSlowInt( Rank + 35 ) - 25;
}