My gauge is: - If I'm there at meal time, I order a meal (8-12-18-22h). - If I stick around in between meal time, I buy a higher-end coffee (>4$) in betw

My gauge is: - If I'm there at meal time, I order a meal (8-12-18-22h). - If I stick around in between meal time, I buy a higher-end coffee (>4$) in between. For every purchase, give max(15%, 1$) in tip.