. . . "the employee has not done betting work) of a contractual term under which the extent of that benefit varies according to the number of hours worked by the employee or the remuneration of the employee; or(c)a failure to provide him with any work, remuneration or other benefit which by virtue of paragraph 4 or 5 the employer is not obliged to provide.(6) Where an employer offers to pay a sum specifi" . .