Given the forecast and booked orders shown in the table, and a beginning inventory of 90, what is the available to promise inventory for the periods 1-4?
Period 1 2 3 4
Forecasted Demand 200 210 240 210
Booked Orders 190 90 60 40
Projected ending inventory ​ ​ ​ ​
Master production schedule 420 0 310 210​
Available to Promise ​ ​ ​ ​
a) 10,120,180,170
b) 190,0,270,190
c) 310,100,170,170
d) 230,0,250,170