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7.some products total costs $54.64 exclusive tax.The tax is $0.79 which is 5% rate to the taxable items. The untaxed costs
My answer: 38.84
确认:39.63
解:令untaxed costs x $,则有 (54.64+0.79)-0.79/5%=39.63
我认为应该是: X+Y=54.64, Y*0.05=0.79,其中X为免税产品,Y为有税产品,X等于39.24 |
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