Sawaya Co., Ltd., of Japan, is a manufacturing company whose total factory overhead costs fluctuate considerably from year to year according to increases and decreases in the number of direct labour-hours worked in the factory. Total factory overhead costs (in Japanese yen, denoted ) at high and low levels of activity for recent years are provided below: The factory overhead costs above consist of indirect materials, rent, and maintenance. The company has analyzed these costs at the 90,000-hour level of activity as follows: V= variable; F= fixed; M= mixed To have data available for planning, the company wants to break the maintenance cost down into its variable and fixed cost elements. Required: 1. Estimate how much of the 15,260,000 factory overhead cost at the high level of activity consists of maintenance cost. (Hint: To do this, it may be helpful to first determine how much of the 15,260,000 consists of indirect materials and rent. Think about the behaviour of variable and fixed costs!)