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Cara :
Persediaan = (2 × 144) + 4
= 292 biji
Dijual = (1 × 144) + (5 × 12) + 7
= 144 + 60 + 7
= 211 biji
Sisa = 292 biji - 211 biji
= 81 biji
Semoga Membantu !!!
2 gros 4 biji
(2×144)+4
288+4=292biji
Jumlah dijual
1gros 5lusin 7biji
144+(5×12)+7
144+60+7
211 biji
Sisa persediaan
292-211
81 biji (D)