$ step 1
Profitina Laundry cashier v0.9 - 0 order(s) loaded from shop.csv
> add fold 3.5 andi pratama
  #1 Andi Pratama, fold, 3.5 kg = Rp 24.500 (waiting)
> add wash-iron 2 budi santoso
  #2 Budi Santoso, wash-iron, 2.0 kg = Rp 20.000 (waiting)
> add iron 4 citra dewi lestari
  #3 Citra Dewi Lestari, iron, 4.0 kg = Rp 24.000 (waiting)
> advance 1
  #1 Andi Pratama, fold, 3.5 kg = Rp 24.500 (washing)
> advance 2
  #2 Budi Santoso, wash-iron, 2.0 kg = Rp 20.000 (washing)
> advance 2
  #2 Budi Santoso, wash-iron, 2.0 kg = Rp 20.000 (ready)
> poweroff
  *** the power goes off ***
$ step 2
Profitina Laundry cashier v0.9 - 3 order(s) loaded from shop.csv
> list
   No  Customer              Service     Weight    Amount  Status
    1  Andi Pratama          fold        3.5 kg    24.500  washing
    2  Budi Santoso          wash-iron   2.0 kg    20.000  ready
    3  Citra Dewi Lestari    iron        4.0 kg    24.000  waiting
  3 order(s) in the shop
> pickup 2
  #2 Budi Santoso picked up, paid Rp 20.000
> add fold 5 dewi anggraini
  #4 Dewi Anggraini, fold, 5.0 kg = Rp 35.000 (waiting)
> quit
Bye. 1 picked up (Rp 20.000), 3 still in the shop.
--- shop.csv ---
id,service,tenths,status,customer
1,fold,35,washing,Andi Pratama
3,iron,40,waiting,Citra Dewi Lestari
4,fold,50,waiting,Dewi Anggraini
