Consider the following premises. For all x_10, x_10 is bored. For all x_10, if x_10 were an office clerk, then x_10 is not bored. There is at least one x_10 for which if x_10 were a cashier, then x_10 is an office clerk. For all x_10, if x_10 takes a plane, then x_10 is a cashier. Can we infer the following from them? For all x_10, if x_10 takes a plane, then x_10 is a cashier.
That is one of the premises. Therefore, the answer is yes.