The journal entry to record the transfer of 1,600 units of part number 1177 with a value of $2.50 each, to work in process is:

a.Work in Process 4,000
Factory Overhead 4,000

b.Work in Process 4,000
Materials 4,000

c.Work in Process 4,000
Cash 4,000

d.Materials 4,000
Work in Process 4,000