I am helping my mother-in-law with her visitor visa application for the UK. This is the new online application process (not the old visa4uk website base).
In the section about income & expenditure they have the following question which is confusing me given her circumstances
What is the total amount of money you spend each month?
My mother-in-law is unemployed and fully supported by her husband. They run the household out of my father-in-law's salary but she does not explicitly spend any money. What should I write here? Can I leave this as zero and provide an explanation in the covering letter that it is her husband who helps with all the expenses?
Note that she is applying alone and travelling alone. She has done this 2 years ago but the application form back then was different.