I simplified the reply for loudspeakers, I converted the 9% to 10,35% to incorporate the uplift
thus (100 x 1.15) x 9%) = 10,35%
With the loudspeakers the VAT is (((100 x 1.1) + 10,35) x 15%) = 18.05% (I made a typo in an earlier message the correct percentage is 18,05 not 18,75)
With...