Total quantity and amount for each month
xtsubstr
month
TotalQuantity
TotalAmount
01
3819
1488557
02
3939
1560494
03
4330
1688577
04
4677
1835522
05
4931
1910983
06
4806
1870580
07
5030
1970791
08
4668
1794748
09
4614
1796331
10
4602
1785801
11
4062
1561058
12
3965
1523414