Trees:
4 + 1/per 5 minutes + 5/ every extra 30 minutes
(over the 25 minute minimum)

= > 4 + 1 / 5 t + 5 * ( t-30 ) / 30


For example, a 65 minute tree would earn you 4 + 13 +5 = 22 coins!
Bushes:
1 + 1/per 5 minutes
For example, a 15-minute bush would earn you 1 + 3 = 4 coins!

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