Please capitalize where necessary: he made one error, however, :
A: He made one error, however, :

Q: hollandbikeshop.com is dealer of cycling wear and has a large and affordable range. we also often have cycling wear on sale or in our outlet, so keep an eye on our sale button.

A: Hollandbikeshop.com is dealer of Cycling Wear and has a large and affordable range. We also often have Cycling Wear on sale or in our outlet, so keep an eye on our sale button.

Q: head & well assemblies - general information
A: Head & Well Assemblies - General Information

Problem: dried potatoes, whether or not cut or sliced, but not further prepared
Can you repeat this sentence, but capitalize it?
Answer: Dried potatoes, whether or not cut or sliced, but not further prepared

Text: this design calls for a 600 mm planting media placed on top of a 150 mm layer of fine aggregate concrete sand that is on top of a 400 mm layer of #7 washed gravel.

Correct capitalization: This design calls for a 600 mm Planting Media placed on top of a 150 mm layer of fine aggregate concrete sand that is on top of a 400 mm layer of #7 washed gravel.

Text: pcs: pacemaker/corosync configuration system, 877 days in preparation, last activity 183 days ago.

Correct capitalization:
pcs: Pacemaker/Corosync configuration system, 877 days in preparation, last activity 183 days ago.