I've had a investigaton they are very very very very very very picky on the smallest things, a table cloths, shiny plate and cost hangers i bought for a client who was a designer, who was pushed finshing off a show house and that was picked up on, and even though had invioced reselling them on to her company, they stated this was suspicoue as we sold them at cost! On the same bill was the cleaning job we where there to do, for over £700 and I explained I drove her to the store and she had forgot her purse so i paid with my business card and added it to her bill.
Result statement required from client and myself for something that happend 2 years previously. Investigation lasted 3 months and cost me £45 in erors and a accountants bill of £200. Aparently the VAT people are even worse!!!
My advice buy your own suit, than charge your company extra for quotations in it!