closing the books, preparing tax returns, paying invoices) to value added activities
Preparing tax returns and paying invoices are related to value added activities.
The 85-m- (267-ft-) tall bell-tower (it's a 414-stair climb to the top) is decorated on its lower sections by hexagonal bas-reliefs sculpted by Andrea Pisano and Luca della Robbia, based on Giotto's drawings.