Nov 25 (Reuters) - Vita Group Ltd VTG.AX
* agreed changes to its commercial terms with strategic partner, Telstra
* Vita expects to see volume improvement overall, offset by some margin compression.
* "net impact of these changes on earnings is difficult to determine"
* under agreed new terms, remuneration structure will change and there will also be additions to group's network of telstra-branded stores Source text for Eikon: ID:nASX1CVJr9 Further company coverage: VTG.AX