Every month, Mike donates $$\frac{1}{4}$$ of his salary to charity. He spends $$\frac{5}{6}$$ of the remainder on food and saves the rest. If he spends £$$78$$ more on food than on donation to charity, how much is his salary? 
Overseas Competition->Knowledge Point->Word Problem Modules->Solving Problems Involving Fractions and Percentages->Converting Between Different Units of Measure 1