public class Calculator { static float itemsSum; static float costPerPerson; public static void sumCostsOfItems(float cost) { itemsSum = itemsSum + cost; } public static float calculateCostPerPerson(int personsQuantity) { costPerPerson = itemsSum / (float) personsQuantity; return costPerPerson; } public static String findRightRoubleWord(int roubles) { String roubleName; int lastDigit; int lastTwoDigits; lastTwoDigits = roubles % 100; if (lastTwoDigits >= 11 && lastTwoDigits <= 14) { roubleName = "рублей"; return roubleName; } lastDigit = roubles % 10; if (lastDigit == 1) { roubleName = "рубль"; return roubleName; } else if (lastDigit >= 2 && lastDigit <= 4) { roubleName = "рубля"; return roubleName; } else { roubleName = "рублей"; return roubleName; } } }