untung 30% = 1800000 × 30/100
= 640000
harga jual per porsi = (1800000 + 640000) / 8000
= 2440000 / 8000
= 305 porsi
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untung 30% = 1800000 × 30/100
= 640000
harga jual per porsi = (1800000 + 640000) / 8000
= 2440000 / 8000
= 305 porsi