Hypothetical combination,Input or result,Your project inputs / Calculated result,Value,Unit,Operation A,Your project inputs,Machine mass,4500,kg, A,Your project inputs,Machine length,4.0,m, A,Your project inputs,Machine width,2.0,m, A,Step-by-step substitution from the stated inputs,Mass (kg/m²) / 1,8.0,,( [Machine length: 4 m] × [Machine width: 2 m] ) A,Step-by-step substitution from the stated inputs,Mass (kg/m²) / 2,562.5,kg/m²,( [Machine mass: 4500 kg] ÷ ( [Machine length: 4 m] × [Machine width: 2 m] )) A,Calculated result,Mass,562.5,kg/m², B,Your project inputs,Machine mass,4500,kg, B,Your project inputs,Machine length,4.0,m, B,Your project inputs,Machine width,3.0,m, B,Step-by-step substitution from the stated inputs,Mass (kg/m²) / 1,12.0,,( [Machine length: 4 m] × [Machine width: 3 m] ) B,Step-by-step substitution from the stated inputs,Mass (kg/m²) / 2,375.0,kg/m²,( [Machine mass: 4500 kg] ÷ ( [Machine length: 4 m] × [Machine width: 3 m] )) B,Calculated result,Mass,375.0,kg/m², C,Your project inputs,Machine mass,4500,kg, C,Your project inputs,Machine length,6.0,m, C,Your project inputs,Machine width,2.0,m, C,Step-by-step substitution from the stated inputs,Mass (kg/m²) / 1,12.0,,( [Machine length: 6 m] × [Machine width: 2 m] ) C,Step-by-step substitution from the stated inputs,Mass (kg/m²) / 2,375.0,kg/m²,( [Machine mass: 4500 kg] ÷ ( [Machine length: 6 m] × [Machine width: 2 m] )) C,Calculated result,Mass,375.0,kg/m², D,Your project inputs,Machine mass,4500,kg, D,Your project inputs,Machine length,6.0,m, D,Your project inputs,Machine width,3.0,m, D,Step-by-step substitution from the stated inputs,Mass (kg/m²) / 1,18.0,,( [Machine length: 6 m] × [Machine width: 3 m] ) D,Step-by-step substitution from the stated inputs,Mass (kg/m²) / 2,250.0,kg/m²,( [Machine mass: 4500 kg] ÷ ( [Machine length: 6 m] × [Machine width: 3 m] )) D,Calculated result,Mass,250.0,kg/m², A→D,Separate and combined changes from A,Mass / First input alone: C − A,-187.5,kg/m², A→D,Separate and combined changes from A,Mass / Second input alone: B − A,-187.5,kg/m², A→D,Separate and combined changes from A,Mass / Both inputs: D − A,-312.5,kg/m², A→D,Separate and combined changes from A,Mass / Sum of the two separate changes,-375.0,kg/m², A→D,Separate and combined changes from A,Mass / Combined change minus that sum,62.5,kg/m²,