On behalf of the Revenue the learned Attorney General contended that the value of drums/containers would also have to be included on a correct interpretation of charging sections, namely, sections 3 and 4 of the Act; the terms of section 4(4)(d)(i) were very clear and specific; it was a well settled principle of construction that in taxing stat utes one had only to look at what was clearly stated, and there was no room for any intendment; percentages of sales did not in any manner affect determination of the assessable value of the excisable goods; though "manufacture" was the taxable event, the measure of the levy need not be and was not to be restricted to the cost of manufacture; it is open to Parliament to prescribe any measure by reference to which the charge was to be levied and this is what was done under section 4; and in construing section 4(4)(d)(i).