Visa refused under V 4 (A-(C) how to overcome this for new application [duplicate]

I am a student in London and my mother applied for a visitor visa to come and visit me. But it was unfortunately refused.

Among the reasons for the refusal which you will read in the refusal letter that i ill attach is the fact that the proof of study i provided her was not legible. Also, for some reason, the ECO did not have a record of my new tier 4 visa, instead he had only my previous 6 months visa. the above problems can be easily fixed as i can provide her with a new legible proof of study certificate, my brp, my home office letter, my police registration, proof of address, my CAS letter,social security number, my sponsorship letter (as i am sponsored by my government to study in the UK) my offer letter, y visa montinoring record, a letter from my employer ( i work part-time job) my supervisor will also provide me with a proof of supervision, my birth certificate...etc. Anything i can get my hands on.

But the for financial reasons, i should explain that my mother has at the moment one income which is her pension.However, she used to be a freelance dressmaker. She is a certified dressmaker and used to rent a store in which she worked for a year and a half. It was a profitable business, but she had to stop due to some health issues as she was getting old. Unfortunately she did not mention this business in her first application, and on that basis, the ECO was not satisfied that she would spend 1400 pounds which is 7 times her pension on an 8 days vacation. Please note that my mother's certification and store lease papers are with her. and she can use them for another application.
Please read the refusal letter and advise me on what changes should i make for the next application? should i include my bank statement? I miss my mother so much and i wish she would come visit me.

I have copy pasted the text of the Refusal Letter

The Decision

You have stated that you intend to travel to the UK to visit your daughter resident in the UK as a student for a period of 8 days. Whilst you have provided letter of support from your UK sponsor, I note that the document provided by you is not legible to substantiate her valid leave to remain in the UK until now. From the information I have, your daughter was only granted 6 months short student visa valid until May 2018.

You have indicated on your application form that you are Pensioner with a monthly income of 53342 DZD (£352) and I accept on the balance of probabilities that you receive this income. However, you have indicated that you spend 25000 DZD (£165.22) per month on living costs and supporting your family, leaving a disposable income of 28342 DZD (£187.30).

You have indicated that your trip to the UK will cost you personally £1400 which represents over 7 times of your disposable income. I am not satisfied that this expenditure is credible when compared to your social and economic circumstances. I am also conscious that this appears to be a significant portion of your life savings and I am not satisfied that this expenditure is credible for a short holiday.

Given above, and on the evidence before me, and the balance of probabilities, I am not satisfied that you have accurately presented your circumstances or intentions in wishing to enter the UK. I am not satisfied that you intend to leave the UK at the end of your visit, that you will not live in the UK through frequent or successive visits, that you are genuinely seeking entry for a purpose that is permitted by the visitor routes. This means that your application for a visit visa has been refused under paragraph V4.2 (a-(c). Rate of exchange £1 = [DZD151.32] (reference www.oanda.com on [14/12/18]

Future Applications

Any future UK visa applications you make will be considered on their individual merits, however you are likely to be refused unless the circumstances of your application change.