Add punctuation: If a fixed fee cannot reasonably be determined at that stage we will upon request submit an estimate
A: If a fixed fee cannot reasonably be determined at that stage, we will upon request submit an estimate.

Add punctuation: Mower Tsunami TG 430W description specifications prices on lawn mowers
A: Mower Tsunami TG 430W - description, specifications, prices on lawn mowers

Add punctuation: After several weeks of headache and conflicting sources I have come to the conclusion that its best to ignore Massmann
A:
After several weeks of headache and conflicting sources, I have come to the conclusion that it's best to ignore Massmann.