daftar pemesan
1..................................
2..................................
3..................................
4..................................
5..................................
--batas diskon (65rb)--
6..................................
7..................................
8..................................
9..................................
10..................................
11..................................
12..................................
---------tahap 1----------
1..................................
2..................................
3..................................
4..................................
5..................................
6..................................
7..................................
8..................................
9..................................
10..................................
11..................................
12..................................
---------tahap 2----------