The following details were extracted from the records of KCL Company for the year 2020:

Month	Units Produced	Total Cost (SAR)
March	40,000	405,000
April	42,000	408,000
May	45,000	410,000
June	47,000	414,000
July	51,000	503,000
August	54,000	524,000
September	32,000	370,000
October	38,000	375,000

Required:

1. Using the high-low analysis method, find out variable and fixed costs and determine a cost function.
2. Take the data for July and August and using the two-point method, find out variable and fixed costs and determine a cost function.