Text: the foundation max havelaar controls the supply chain from producer to consumer.

Correct capitalization: The foundation Max Havelaar controls the supply chain from producer to consumer.

Text: "i've always wanted a barn with high cow comfort, low construction costs, simple working procedures, and that is easily manageable.

Correct capitalization: "I've always wanted a barn with high cow comfort, low construction costs, simple working procedures, and that is easily manageable.

Text: a manufacturer of 3x5 watts 14 watt at guangdong china.

Correct capitalization: A manufacturer of 3x5 watts 14 watt at GuangDong China.

Text: the spray gun for greater comfort.

Correct capitalization:
The spray gun for greater comfort.