cheaper_price,pricier_price,price_ratio_q_over_p,promotion,trip_cost,items_received,average_cost_per_item
1.0,1.0,1.0,BOGO (cheaper free),1.0,2,0.5
1.0,1.0,1.0,50% off each,1.0,2,0.5
1.0,1.0,1.0,Second item half price,1.5,2,0.75
2.0,2.0,1.0,BOGO (cheaper free),2.0,2,1.0
2.0,2.0,1.0,50% off each,2.0,2,1.0
2.0,2.0,1.0,Second item half price,3.0,2,1.5
5.0,10.0,2.0,BOGO (cheaper free),10.0,2,5.0
5.0,10.0,2.0,50% off each,7.5,2,3.75
5.0,10.0,2.0,Second item half price,12.5,2,6.25
10.0,20.0,2.0,BOGO (cheaper free),20.0,2,10.0
10.0,20.0,2.0,50% off each,15.0,2,7.5
10.0,20.0,2.0,Second item half price,25.0,2,12.5
