# 1. Goal
Show the green waste that each collection round delivered to the composting
plant in an ALV list. The plant office uses the list to compare the rounds for
a period.

# 2. Open questions
None.

# 3. Context
- Table {{P}}GWASTE exists in package $TMP. It contains data.
  Fields: DELIVERY_ID (INT4, key), ROUND_ID (CHAR 6), WASTE_TYPE (CHAR 4),
  DELIV_DATE (DATS), WEIGHT_KG (DEC 15,2).

# 4. Contract
- Create the executable program {{P}}COMPOST_SUM in package $TMP.
- Selection screen:
  - Parameter P_FROM, type DATS, mandatory: the first delivery date to include.
  - Select-option S_ROUND for the collection round.
- Show the result with CL_SALV_TABLE. The output table has these columns, with
these names: ROUND_ID, TOTAL_KG (sum of WEIGHT_KG), DELIVERIES (number of
deliveries), HEAVY (number of heavy deliveries).

# 5. Business rules
1. Include a delivery only if DELIV_DATE is on or after P_FROM and ROUND_ID is
   in S_ROUND.
2. Show one line for each round that has at least one included delivery.
3. A delivery is heavy if WEIGHT_KG is 1000 kg or more.
4. Sort the lines by TOTAL_KG, the highest total first.

# 6. Constraints
- Release target: 8.16.
- Coding standards: Clean ABAP. Read the data with one database access.
- Out of scope: do not change {{P}}GWASTE.

# 7. Acceptance
- The program is active and has no syntax error.
- The hidden tests pass.
- Write ABAP Unit tests as local test classes in the program.