CompanyA	1.3%	(3.9%)	1.7%	0.5%	0.1%	(3%)	4%	5%	1%	0.7%	6%	(4.7%)
Months	Jan	Feb	Mar	Apr	May	June	July	Aug	Sep	Oct	Nov	Dec

if invest 3000 per month, first monthly return =3000*1.013, second monthly return =(3000+3000*1.013)*-3.9%Total investment period: 10 years , how to write the codes?