"When I requested an estimate for the repair, the repair cost was 30,000 yen."
- "When I requested an estimate for the repair, the repair cost was 30,000 yen."
"when ~" 「〜したら」
"I requested" 「〜依頼した」
"an estimate" 「見積もり」
"the repair" 「修理」
"an estimate for the repair" 「修理見積もり」
"the repair cost" 「修理代」
"was 30,000 yen" 「3万円だった」"30,000" = "thirty thousand"