When purchasing multiple items using p.302 and p280 in the BBB, does the total time for each item add up? or does it occur at the same time?
for example ... If a fixer is purchasing some gear for a character:
Pistol = 3 days
Some cool new cyberware = 10 days
Hip new chemicals = 8 days
2 used trucks = 13 days
Does this take the fixer 34 days or 13 days to deliver?
Can the fixer be purchasing items for others during this time?
Is this the same for characters making the purchases themselves?
Also, if there is any specific passage in the book that might clear this up it would really help.

Thanks!