Boost

Boost is a spell that costs 25 mana and gives 25 money /s, 50 stone/s, 50 wood/s, 5 iron ore/s, .5 oil/s

This mean that the spell provides 25(1/money)/s + 25(.5/stone)/s +  25(.5/wood)/s + 5(1/iron ore)/s + 1(2/oil)/s = 81 prestige/s