Solution
= 25% of 544 + 38% of 1400 + 60% of 2880
= $$\frac{25}{100}\times544+\frac{38}{100}\times1400+\frac{60}{100}\times2880$$
= $$\frac{1}{4}\times544+38\times14+6\times288$$
= $$136+532+1728$$
= 2396
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