Since a new suit is a private good, if Latasha chooses to spend $300 on a new suit, Latasha would get $300 of benefit from the new suit and Rosa wouldn't receive any benefit from Latasha's choice. If Latasha still spends $300 on a new suit and Rosa chooses to contribute $300 to the water fountain, Latasha would still receive the $270 of benefit from Rosa's generosity. In other words, if Latasha decides to keep the $300 for a new suit and Rosa decides to contribute the $300 to the public project, then Latasha would receive a total benefit of: