Max of Sum of Amount and Corresponding values

[Zain26]

Hello

Bit inexperienced with PowerBI, I am trying to calculate the Max, 2ndMax and 3rdMax amount based on the following columns. I want the Max of Sum of Amount for each Mapping, then I intend to print out the text against which I have calculated the Max and 2ndMax values as well in separate Card Visuals. 

Mapping      Amount

Alpha             10
Alpha             30

Beta               20

Beta               50

Alpha             40
Gamma          25
Gamma          50

The following query gave me the Max Amount for a Mapping i.e. 80 (Alpha). 

Var maxAmount= MAXX(CALCULATETABLE(VALUES(table[Mapping]),ALLEXCEPT( table,table[Mapping])),CALCULATE(SUM(table[Amount])))

I want to get 75 as the second Max value and 70 as the third Max, as separate Measures. 
After this I want to get the corresponding Mapping values i.e. Alpha, Beta, Gamma in separate card visuals. 

[Zain26]

Bit inexperienced with PowerBI, I am trying to calculate the Max, 2ndMax and 3rdMax amount based on the following columns. I want the Max of Sum of Amount for each Mapping, then I intend to print out the text against which I have calculated the Max and 2ndMax values as well in separate Card Visuals. 

Mapping      Amount

[Zain26]

Alpha             10
Alpha             30

[Zain26]

Beta               20

Beta               50

Alpha             40
Gamma          25
Gamma          50

The following query gave me the Max Amount for a Mapping i.e. 80 (Alpha). 

Var maxAmount= MAXX(CALCULATETABLE(VALUES(table[Mapping]),ALLEXCEPT( table,table[Mapping])),CALCULATE(SUM(table[Amount])))

I want to get 75 as the second Max value and 70 as the third Max, as separate Measures. 
After this I want to get the corresponding Mapping values i.e. Alpha, Beta, Gamma in separate card visuals. 

[Zain26]

Beta               20

Beta               50

Alpha             40
Gamma          25
Gamma          50

[Zain26]

Beta               20

Beta               50

Alpha             40
Gamma          25
Gamma          50

[Zain26]

Beta               50

Alpha             40
Gamma          25
Gamma          50

[Zain26]

Alpha             40
Gamma          25
Gamma          50

[Phil_Seamark]

HI @Zain26

I get why your Max for Alpha is 80 (10 + 30 + 40), but I can't see where you work out that 75 is the 2nd Max

[Zain26]

Hi @Phil_Seamark, 
Apologies for the poor formatting of the demo columns. 2nd Max would be 75 because Gamma (50+25), and accordingly 3rd Max would be 70 as Beta has values (50+20)