Answer:
 he save last month $33.25
Explanation:
Let us assume last month saving be x
This month saving be 3x + $8 
And, the total would be $141
So based on the above information 
The equation is 
x + 3x + $8 = $141
4x + $8 = $141
4x = $141 = $8
4x = $133
x = $33.25
Hence, he save last month $33.25
Therefore the same is relevant