How much spending money (in SGD) should I bring to Singapore for 3 days and 3 nights?

i already have an accommodation, i wont do shopping. Just touring / sightseeing and eating. Please help me!
meals cost around 3 to 5 SGD ( local food stalls, mostly chinese food)

western food is usually more expensive ( the cheapest one i found is around 5 to 6 SGD)

mineral water is around 2 to 3 SGD ( big ), 1.5 SGD ( small)



MRT fare is around 1 to 3 SGD, alternatively u can buy one day ticket, the last time i went there it costed 8 SGD but i heard that it costs around 10 SGD now.

taxi fare is quite expensive coz there are some charges, for example peak hours charge, etc.



touring/ sightseing cost is various, for example, hippo river cruise package costs15 SGD per person, singapore flyer n trishaw package costs 39.90 SGD



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