Easy javascript code

I need you to write javascript function which converts plain table data into tree-like structure performing grouping and sum calculation. Sample input: [{"taskName":"task 1","projectName":"project 1","memberName":"member1","timeSpentInMinutes":34,"costInUsd":10.10},{"taskName":"task 1","projectName":"project 1","memberName":"member2","timeSpentInMinutes":34,"costInUsd":10.10},{"taskName":"task 2","projectName":"project 1","memberName":"member2","timeSpentInMinutes":34,"costInUsd":10.10}] Sample output: [ "projectName": "project1", "timeSpentInMinutes": 102, "costInUsd": 30.30, "members": [ { "memberName": "member1", "timeSpentInMinutes": 34, "costInUsd": 10.10, "tasks": [ {"taskName": "task 1", "timeSpentInMinutes": 34, "costInUsd": 10.10} ] }, { "memberName": "member2", "timeSpentInMinutes": 68, "costInUsd": 20.20, "tasks": [ {"taskName": "task1", "timeSpentInMinutes": 34, "costInUsd": 10.10}, {"taskName": "task2", "timeSpentInMinutes": 34, "costInUsd": 10.10} ] } ] ] Budget is 10$. Easy money and feedback for experienced person. Please let me know your experience with Javascript, JQuery, HTML and CSS as I have a few outstanding projects to do.