Im not sure- my answer doesnt match the given options at all. I think the issue may be in my interpretation of the registration and insurance.

Eg. paycheck= 100.

Repair= 25, remander= 75.

Is registration and insurance each 1/4 of 100 or 75? According to the question, it is the remainder, ie, 75.

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Let x be the total amount in the paycheck.

Repair= x/4

Registration and Insurance cost 1/4 of the remainder amount each= 3x/4 *1/4*2= 3x/8

x/4+3x/8+231=x

231= x-(x/4+3x/8)=(8x-5x)/8

231 (8)= 3x

x= 77*8= 616.

I did the recheck by plugging the answer.

Repair cost= 154

Insurance and Registration each= 115.5

615-154-115.5-115.5=231

Bunuel could you please advise.