90s are big.
Early 1990s salaries might be below survivable, so a lot of people, even in cities and towns, had allotments or dachas. In the late 90s it would start to change. In the beginning of 90s hyperinflation would be eating your income so quickly people would not be saving money at all - and actually spending most of it right after the salary is paid.
Late 90s were a bit different as the inflation was already less brutal, but there was a big crisis in 1999 (I believe) where the currency - Hryvna - halved in a couple of months.
In Ukraine teachers were - and I believe for public schools currently are - paid by the government, so, money would come in a more predictable way, and, despite the salary size, they might be actually supporting the whole family - along with possible pensions of the parents where applicable.
My mum worked in a position paid by the government and, although my dad's salary theoretically was higher, the delays were huge - a year's salary not paid was not unique. He sometimes was paid in goods or food, so, they would be exchanging between people they knew who worked for other places and had their salaries paid in other stuff.
I don't think I thought in dollars in 90s myself, but when you needed to rent a flat, or buy a car, it would be in dollars only - which were called "conventional units" as setting price in dollars would be illegal, and 1 unit would be 1 US dollar.
In early 2000s people would already start thinking in dollars more, as real estate, electronics, cars and a lot of goods were linked to US dollars. So, my salary in 2000 would be equivalent of 50 USD initially after graduation from a Uni and grew gradually to 100 USD when I left that job in 2001. $100 allowed me to rent a flat in a city of 1.5M population, buy food and pay for public transport. Clothes were being bought in second hand shops - which, I assume now, were European donations commercialised and sold - often by weigh.
My colleague's parents bought himself a 2 room (+ tiny kitchen) flat in 2000 for $2800.
So a salary $45 per month for 2 school teachers in mid-90s sounds plausible. A good school teacher would probably be having some extra by giving private lessons, there were also possibility of working long hours in some places. Although, in other places you would be forced to work full time but have less salary as there was no budget and the job needed to be done.