All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah and that Muhammad is His slave and Messenger.
If the company buys the clothes and possesses them as per Islamic law [i.e. it really becomes the owner of these clothes] and then it sells them to the merchant with specific installments while it does not set any prohibited conditions, such as imposing a fine for the delay, or asking for commercial insurance, or other forbidden conditions, then there is nothing wrong in doing so, as this is a kind of sale that Allaah has permitted with its conditions; Allaah says (what means): {But Allaah has permitted trade and has forbidden interest.} [Quran 2:275] {C}
Also, there is nothing wrong with the company taking a profit of 15% from the merchant or any other percentage that is agreed upon (between the two parties) and is specified at the time of the contract; the profit is the main purpose of trade, and this is something permitted without any specific limit (for the profit).
'Urwah ibn Ja’d said:
“A jalab (merchandise) came to the Prophet (in Madeenah); so he gave me one dinar and said to me, 'O 'Urwah, go to that jalab and buy a sheep for us.' Thereupon, I went to the jalab and bargained and bought two sheep with one dinar. On my way back, I met a man who wanted to buy a sheep from me. So I sold one sheep for one dinar, and brought one dinar and a sheep to the Prophet . I said, 'O Prophet of Allaah, this is your money and this is your sheep...' Thereupon, the Prophet invoked Allaah, saying, 'O Allaah bless him in his deals.'” [Al-Bukhari]
Besides, Al-Bukhari reported that Az-Zubayr had bought Al-Ghaabah land for one hundred and seventy thousand. His son 'Abdullaah sold it for one million and six hundred thousand. This means that he sold it at a price that is nine times more than its original price.
Allaah knows best.