If she works for 10 hours a day at an hourly pay of $50, then her total income in a day is $<<10*50=500>>500.
If she doesn't meet the deadline Jose gave her, she'll lose 20/100*$500 = $<<20/100*500=100>>100
She'll receive $500-$100= $<<500-100=400>>400 if Jose cuts out 20% of her pay.
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