1.1 15000×30=450000
1.2 15000×0.4=6000 inventory balance at the beginning of January
15000 - sales, 12000∗0.4=4800− inventory balance at the end of January
hence the volume of production for January :6000+x-15000=4800, x=13800
1.3 13800×2×10=276000
1.4 13800×2×3=82800
1.5 40×13800+6000×38−40×4800)=552000+228000−192000=588000
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