well, M. Jonhson have been a nice guy, so i want to make him cookies.
As a good french shadowrunner, i have the artisan skill cooking at 6.
So i open my cooking book, page 145 : Build and repairs rules....
"Building or repairing an object is an Extended Test that the gamemaster may decide requires certain tools or facilities." ok, i have the kitchen i my high lifestyle, that's ok.
"The gamemaster assigns a threshold and interval for the Extended Test using the Task Difficulty Threshold table and Extended Test Thresholds table on p. 48." ok, that's up to the GM too, i hope i will no take more than 2-3 hours to make some cookies.
So i suppose it's up to the GM to decide the cost of ingredients...
Maybe some basic lines could help.
repairing cost like 1% of the price of the item by case to repair?
building from scratch a well known item, with blueprint for half the market price?
creating a new item, after months on studies just to create the blueprint? are you insane? i'm a shadowrunner, not a corpslave!