the answer
1,250,000sheets a day
the number of sheet in a month is 30x1,250,000=37500000sheets
5.80×10^6 sheets are used to make 1.45×10^4 notebooks,
so in 30days
5.80×10^6 --------------->1.45×10^4
37500000sheets-------> X= 37500000sheets x 1.45×10^4 / 5.80×10^6
X= 375000sheets x 1.45 / 5.8=93750 notebooks