Exercise 12.1: washers (section 'wash') per outlet, every outlet listed
  O01  Profitina Laundry Rungkut    2
  O02  Profitina Laundry Keputih    3
  O03  Profitina Laundry Wiyung     2
  O04  Profitina Laundry Mulyosari  0
Exercise 12.2: September 2026, charged per service, the five largest
  S0001  Wash, dry & fold (per kg)                 123 bills  Rp 6.032.000
  S0002  Express wash & fold, 1 day (per kg)        35 bills  Rp 1.632.000
  S0003  Ironing only (per kg)                      35 bills  Rp 1.044.000
  S0008  Bed cover, any size (per item)             13 bills  Rp 525.000
  S0004  Dry cleaning - shirt/blouse (per item)     10 bills  Rp 440.000
