It is simple:

The cost of 2-day workshop in Rome is 220 Euro (accommodation and food not included).
The cost of 4-day retreat in Trevi nel Lazio is 590 Euro (includes accommodation, breakfast and lunch, as well as transportation within the Parco Naturale Monti Simbruini)
The cost of full edition of The Apennine School of Living Philosophy (circa 150 hours) is 1480 Euro
One day of staying at the School outside workshops is 40 Euro.

The prices do not include airfare.