I ’ ll show you around and explain the operation as we go along .   That ’ ll be most helpful .   That is our office block . We have all the administrative depart - ments there . Down there is the research and development section .   How much do you spend on development every year ?   About 3-4 % of the gross sales .   What ’ s that building opposite us ?   That ’ s the warehouse . We keep a stock of the faster moving items so that urgent orders can be met quickly from stock . 