You can prepare your own meals for your trip. Making your own meals may save time and money, and you know exactly what goes into everything you prepare. According to these sentences ......
1 )
preparing your own meals means spending more money
2 )
you spend much time when you prepare your own meals
3 )
the writer suggests that you spend much money for your food when you go on a trip
it is important to make meals without wasting time or money