Answer:
A) The journal entry to record the first purchase order:
Dr Receiving Inventory - milling blanks 6,875
  Cr Accounts payable 6,875
The journal entry to record the second purchase order:
Dr Receiving Inventory - sheet metal 62,200
  Cr Accounts payable 62,200
The journal entry to record the third purchase order:
Dr Receiving Inventory - milling lubrication 2,375
  Cr Accounts payable 2,375
B)
Dr Receiving Inventory - milling blanks 6,930
  Cr Manufacturing overhead 6,930
Dr Receiving Inventory - sheet metal 11,055
  Cr Manufacturing overhead 11,055
C)
Dr Receiving Inventory - milling lubrication 175
  Cr Manufacturing overhead 175
D)
Dr Raw materials inventory 89,610
  Cr Receiving Inventory - milling blanks 13,805
  Cr Receiving Inventory - sheet metal 73,255
  Cr Receiving Inventory - milling lubrication 2,550