Deductions & credits

So, I have donated 7   16 ft trailer loads of goods from my mothers home - she has been injured and was having to stay at my brothers house - she is a hoarder and in order for her to return home the house had to be cleaned, repaired, etc... I live 3.5 hours from her home and drove approx 366 miles every other weekend plus my time working 3 to 5 days each trip (time away from work).  How do I go about calculating a price for the items donated as my expenses did not involve the purchase of materials, but time and travel