How much does the farm equipment cost should also be correct
Mahalo for that suggestion! I will add it in.
Because of "nā", "farm gear" should be pluralized.
It is. Gear is one of those words that can be either singular or plural when used to mean supplies. Gear wheels, on the other hand, take the s if there are more than one.
gear in this context is a collective noun and would not be plural with an s.
So why the nā? When they translate lako as supplies, the nā makes sense.