// what is currently on sale
cd P_1
cd derivatives
cd offered
cp added $P2/P_1_derivatives_offered_added
cp deleted $P2/P_1_derivatives_offered_deleted
cd ..
// what has been bought in this round?
// serves as request for raw materials
cd sold
cp delta $P2/P_2_derivatives_sold_delta

// writing for P_2

cd P_2
cd derivatives
cd offered
// new derivates that are for sale
cp $P_2/P_2_derivatives_offered_added added
// derivates removed from store
cp $P_2/P_2_derivatives_offered_deleted deleted
// derivatives bought
cp $P_2/P_2_derivatives_bought_delta delta
cd ..
cd ..
cd raw_materials
cd delivered
// raw materials for sold derivatives
cp $P_2/P_2_raw_materials_delivered_delta delta
// raw materials for derivatives bought on PREVIOUS round
cp $P_2/P_2_raw_materials_received_delta delta