40a: Checked tuples
('2026-10-01', 'Spring search', 30000, 12)
('2026-10-01', 'Office newsletter', 12000, 8)
Daily report:
report_date,cost_eur,enquiries,cost_per_enquiry_eur
2026-10-01,420.00,20,21.00
40b: Successful run accepted 2 rows
Wrong-date failure: Line 2: unexpected business date
Previous report unchanged: True
Fractional-cent failure: Line 2: use at most two money decimals
Previous report still unchanged: True
