You Are Planning to Add New Mulch to All the Landscaping

Essay

You are planning to add new mulch to all the landscaping beds around your house. You have determined the quantity of mulch you will need and have identified these two options for getting the mulch to your house:
1.You can have all the mulch delivered to your yard in one dump truck for $450.
2.You can make four trips to the garden center with your pickup truck and haul it yourself. It will cost you $75 per load for the mulch, plus $25 in fuel and truck wear per load. You estimate it will take about five hours to haul and unload all four loads.
What is the full cost of each method? Which method is cheaper? How is opportunity cost relevant?