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(9/10 of 3999.79) - √2499.83 + (17.81% of 1199.81) (9/10 of 4000) - √2500 + (18% of 1200) 9/10 of 4000 = (9/10) × 4000 = 3600. √2500 = 50. 18% of 1200 = (18/100) × 1200 = 216. Adding and subtracting: 3600 - 50 + 216 = 3766.
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