With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: Impossible to say , but I guess you would have to work out fuel consumption for the particular vehicle that they are using and pay a proportion of that , and some on top for the driver 's time and effort , unless you are able to share transport with another or more , that would keep the costs down .
text_B: The having happened
not-entailed.