properties , plants , and equipment . properties , plants , and equipment are recorded at cost . depreciation is recorded principally on the straight-line method at rates based on the estimated useful lives of the assets . the following table details the weighted-average useful lives of structures and machinery and equipment by reporting segment ( numbers in years ) : .

structures: global rolled products: 31
engineered products and solutions: 29
transportation and construction solutions: 27
machinery and equipment: global rolled products: 21
engineered products and solutions: 17
transportation and construction solutions: 19

gains or losses from the sale of assets are generally recorded in other income , net ( see policy below for assets classified as held for sale and discontinued operations ) . repairs and maintenance are charged to expense as incurred . interest related to the construction of qualifying assets is capitalized as part of the construction costs . properties , plants , and equipment are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets ( asset group ) may not be recoverable . recoverability of assets is determined by comparing the estimated undiscounted net cash flows of the operations related to the assets ( asset group ) to their carrying amount . an impairment loss would be recognized when the carrying amount of the assets ( asset group ) exceeds the estimated undiscounted net cash flows . the amount of the impairment loss to be recorded is calculated as the excess of the carrying value of the assets ( asset group ) over their fair value , with fair value determined using the best information available , which generally is a discounted cash flow ( dcf ) model . the determination of what constitutes an asset group , the associated estimated undiscounted net cash flows , and the estimated useful lives of assets also require significant judgments . goodwill and other intangible assets . goodwill is not amortized ; instead , it is reviewed for impairment annually ( in the fourth quarter ) or more frequently if indicators of impairment exist or if a decision is made to sell or exit a business . a significant amount of judgment is involved in determining if an indicator of impairment has occurred . such indicators may include deterioration in general economic conditions , negative developments in equity and credit markets , adverse changes in the markets in which an entity operates , increases in input costs that have a negative effect on earnings and cash flows , or a trend of negative or declining cash flows over multiple periods , among others . the fair value that could be realized in an actual transaction may differ from that used to evaluate the impairment of goodwill . goodwill is allocated among and evaluated for impairment at the reporting unit level , which is defined as an operating segment or one level below an operating segment . arconic has eight reporting units , of which four are included in the engineered products and solutions segment , three are included in the transportation and construction solutions segment , and the remaining reporting unit is the global rolled products segment . more than 70% ( 70 % ) of arconic 2019s total goodwill is allocated to two reporting units as follows : arconic fastening systems and rings ( afsr ) ( $ 2200 ) and arconic power and propulsion ( app ) ( $ 1647 ) businesses , both of which are included in the engineered products and solutions segment . these amounts include an allocation of corporate 2019s goodwill . in november 2014 , arconic acquired firth rixson ( see note f ) , and , as a result recognized $ 1801 in goodwill . this amount was allocated between the afsr and arconic forgings and extrusions ( afe ) reporting units , which is part of the engineered products and solutions segment . in march and july 2015 , arconic acquired tital and rti , respectively , ( see note f ) and recognized $ 117 and $ 298 , respectively , in goodwill . the goodwill amount related to tital was allocated to the app reporting unit and the amount related to rti was allocated to arconic titanium and engineered products ( atep ) , a new arconic reporting unit that consists solely of the acquired rti business and is part of the engineered products and solutions segment . in reviewing goodwill for impairment , an entity has the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not ( greater than 50% ( 50 % ) ) that the estimated fair value of a reporting unit is less than its carrying amount . if an entity elects to perform a qualitative assessment and determines that an impairment is more likely than not , the entity is then required to perform the .

Questions:
what is the goodwill related to arconic fastening systems and rings?
what about related to arconic power and propulsion?
what is the total value of goodwill?
what is the value of goodwill recognized for arconic acquired firth rixson?
what about for arconic acquired rti?
what is the difference among these?

Answers:
2200
1647
3847
1801
298
1503