How much ang bao to give confinement nanny over and above the fee she is asking? Is there a market rate for this?

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Anywhere from $50 to 288 depending on your generosity and affordability

no market rate. It's more of thoughts. If she does well, give more!

For me, I gave within my means it's more of a token.

No specific amount. Depends on what you can afford.

$50-$100 within your means

Generally $88