1-I don't exactly know the average hourly payment in my salary its like if the month is 30 days less than a month with 31 days and it really depends on the overtime shifts but it is not clear in my paystub. Should I write a separate letter of explanation to the officer and tell them what I did and how I wrote my income?
2-Another question that I have is that I kind of got confused with the start point of applying for visitor visa, should I apply with GCkey or from an IRCC account?
3- I don't know how to fill the part which asks about how much money I have to stay in Canada?? since my mother in my home country and my sister in Canada are going to financially support me and I myself only have the money for staying for one month in Canada.
1- I imagine you are paid a base salary either on an hourly, daily, weekly or monthly, use what ever that figure is and come up with a monthly wage.
2-https://laws-lois.justice.gc.ca/eng/acts/c-46/section-129.html
3-They want to know how much YOU have for your trip, your relatives money isn't taken into consideration. If you will be staying with your sister get a letter of support from her to that effect saying that and she will pay for your expenses while here. That should lessen the $$ you have to show. On the app I would only indicate a stay of 2 weeks not a month. Once you get the visa you can change your plans and stay longer unless CBSA says it is only for xxxx amount of time when you enter Canada.