28. On January 1, 2027, a contractor started a construction project for $1,350,000; estimated construction costs (total) were $1,050,000. Data for the two-year period: Based upon the above data, provide the following amounts for each method: (a) $600,000$540,000=$60,000 (b) $1,350,000$1,065,000=$285,000 (c) ($1,350,000$1,050,000)(600/1,050)=$171,429 (d) $285,000$171,429=$113,571