Questão jurídica principal
Whether the contractor sufficiently substantiated the hourly rates/self-costs for work remuneration.
Decisão extraída
The substantiation was insufficient; the cantonal court could require further substantiation before taking evidence or estimating under Art. 42(2) OR.
Fundamentação extraída
The appellant’s own submissions referred to multiple add-ons and did not clearly separate actual wage costs from overhead, administration, risk, profit, or VAT.