Bookmaker bwin took into account transfer fees and wages to discover who were the best bargain buys from last summer and who wasted the most money on players who failed to perform or even make the pitch in the 2017/18 season.
The analysis has taken into account minutes played, goals, assists, clean sheets and saves made - with Seagulls keeper Mathew Ryan the best value goalkeeper for cost per save made.
Gross' seven goals and eight assists cost Brighton just Â£284,000 each, while Salah's 34 goals and 11 assists cost Liverpool just over Â£1m each.
Watford's Kiko Femenia and Everton's Cuco Martina were the only signings to cost less than Â£1,000 per minute – the free transfers played 1,851 and 1,939 minutes respectively.
Brighton paid just over Â£50,000 per Ryan save, making him the best value goalkeeper – as the 26-year-old made 125 saves last season.
On the flip side, Everton midfielder Davy Klaassen cost over Â£100,000 per minute played and he failed to register a goal or assist all season.
Title-winning keeper Ederson was the worst value goalkeeper, with Manchester City paying more than Â£700,000 for each of his 56 saves.
Kevin Wimmer's solitary clean sheet cost Stoke more than Â£21m, while Fernando Llorente's solitary Premier League goal cost Tottenham Â£17.5m.
Cost per minute on the pitch:Top 5:Kiko Femenia (Watford) - Â£562Cuco Martina (Everton) - Â£939Pablo Zabaleta (West Ham) - Â£1,100Mathias Jorgensen (Huddersfield) - Â£1,134Darren Fletcher (Stoke) - Â£1,211Worst 5:Benjamin Mendy (Manchester City) - Â£142,020Davy Klaassen (Everton) - Â£103,100Nahki Wells (Burnley) - Â£71,628Jonathan Walters (Burnley) - Â£69,808Danny Drinkwater (Chelsea) - Â£69,086
Cost per goal (strikers signed in the summer of 2017):Top 5:Wayne Rooney (Everton) - Â£832,000Jermain Defoe (Bournemouth) - Â£845,000Laurent Depoitre (Huddersfield) - Â£873,333Chris Wood (Burnley) - Â£1,658,000Joselu (Newcastle) - Â£1,757,500
Worst 5 (strikers signed in the summer of 2017):Fernando Llorente (Tottenham) - Â£17,490,000Kelechi Iheanacho (Leicester City) - Â£9,350,000Wilfried Bony (Swansea) - Â£8,190,000Alvaro Morata (Chelsea) - Â£6,203,636Romelu Lukaku (Manchester United) - Â£5,349,375
Cost per goal + assist (midfielder):Top 5:Pascal Gross (Brighton) - Â£284,000Eric Choupo-Moting (Stoke) - Â£338,000Mohamed Salah (Liverpool) - Â£1,048,571Aaron Mooy (Huddersfield) - Â£1,348,750Will Hughes (Watford) - Â£1,950,000
Bottom 5:Adrien Silva (Leicester City) - Â£26,210,000Mario Lemina (Southampton) - Â£9,340,000Oliver Burke (West Brom) - Â£7,620,000Gylfi Sigurdsson (Everton) - Â£7,242,857Jacob Murphy (Newcastle) - Â£5,735,000
Cost per clean sheet (defender):Top 5:Kiko Femenia (Watford) - Â£148,571Cuco Martina (Everton) - Â£303,333Pablo Zabaleta (West Ham) - Â£390,000Mathias Jorgensen (Huddersfield) - Â£414,600Charlie Taylor (Burnley) - Â£433,333Bottom 5:Kevin Wimmer (Stoke) - Â£21,100,000Benjamin Mendy (Manchester City) - Â£11,390,000Victor Lindelof (Manchester United) - Â£6,290,000Mamadou Sakho (Crystal Palace) - Â£5,096,667Serge Aurier (Tottenham) - Â£3,808,571
Cost per save (goalkeepers):Top 3:Matthew Ryan (Brighton) - Â£57,760Asmir Begovic (Bournemouth) - Â£124,911Willy Caballero (Chelsea) - Â£222,857
Bottom 3:Ederson (Manchester City) - Â£714,357Eldin Jakupovic (Leicester City) - Â£408,250Paulo Gazzaniga (Tottenham) - Â£346,667