Write a Python code to read data from the below text file and store the costs into a dictionary called 'costs'. The item on the left is the key and the amount of costs on the right is the value. If the item appears several times, sum them together. If the amount is empty or zero, don't add this item into the dictionary.

Example output:

costs = {'breakfast': 3.55, 'bus': 5.5, 'coffee': 6.95, 'lunch': 19.95, 'dinner': 25.55}

breakfast: 3.55 newspaper: bus: 2.75 : coffee: 4.5 lunch: 19.95 coffee: 2.45 fruits: 0 bus: 2.75 dinner: 25.55