4. The newlyweds, the Batterykins, have a combined monthly income of 150,000 rubles. Monthly expenses (food, utilities, mortgage payments, etc.) amount to 115,000 rubles. At the beginning of the year, the family's savings amounted to 45,000 rubles. The family plans to buy new kitchen furniture worth 127,000 rubles using only their own funds. In which month will the family be able to do this? It should be noted that the salary for the month is received on the last day of the month; at that time, the family also makes most of their expenses, including the mortgage payment.
Answer: April

The family's net monthly income is $150000-115000=35000$ rubles.

The missing amount of funds for the purchase of furniture is $127000-45000=82000$ rubles.

The number of months required to reach this amount is $82000 / 35000=2.3$. Rounding up, we get 3 months. According to the condition of the problem, the required amount will only be available by the end of March. Therefore, the furniture can be purchased in April.