(29.98% of 9840) + ? + (19.899% of 8490) = 7560
(29.98% of 9840) + ? + (19.899% of 8490) = 7560 30% of 9840 + ? + 20% of 8490 = 7560 2952 + ? + 1698 = 7560 ? = 7560 – 4650 = 2910
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