What is the ruling on giving flour to a bakery to make bread in exchange for a known fee and a specified weight of bread, given the differing opinions of scholars between prohibition and permissibility?

The image displays a sale of a bag of flour for bread with a monetary increase. Scholars have differed regarding its ruling: Malik and Abu Hanifa permitted it, based on the premise that the manufacturing process has changed the bread from the category of flour. Al-Shafi'i and the Hanbalis prohibited it due to uncertainty regarding the equivalence between flour and bread. We incline towards the view of the Shafi'is and Hanbalis, which is prohibition, without censuring those who adopt the view of Malik and Abu Hanifa.