Sam and Tom each own 50% of the ST partnership. ST partnership uses a calendar year. On June 30th, Sam sells of his partnership

Sam and Tom each own 50% of the ST partnership. ST partnership uses a calendar year. On June 30th, Sam sells ½ of his partnership interest (25%) to Paul. After the sale, the partnership ownership is Sam 25%. Tom 50% and Paul 25%. For the calendar year, ST partnership earns $10,000 a month January-August and $20,000 per month September-December. 

a) What are the 2 methods to calculate the income of Sam and Paul for the year? What are the differences in the 2 methods? 

b) Compute the income to be allocated to Sam and Paul for the year using both methods.