Roberto's Department Store Adventure

How many floors did Roberto go up to get to the houseware department?

After leaving the houseware department, how many floors did Roberto go down to reach the children's department?

In total, how many floors did Roberto go up from the credit department to the TV department?

How many floors did Roberto go down from the TV department to leave the store at the main entrance?

If the main entrance is on the first floor, how many total floors does the department store have?