Calculate the record size R in bytes.
Consider a disk with block size B=512 bytes. A block pointer is P=6 bytes long,
and a record pointer is P R =7 bytes long. A file has r=30,000 EMPLOYEE records
of fixed-length. Each record has the following fields: NAME (30 bytes), SSN (9
bytes), DEPARTMENTCODE (9 bytes), ADDRESS (40 bytes), PHONE (9 bytes),
BIRTHDATE (8 bytes), SEX (1 byte), JOBCODE (4 bytes), SALARY (4 bytes, real
number). An additional byte is used as a deletion marker.
Record length R = (30 + 9 + 9 + 40 + 9 + 8 + 1 + 4 + 4) + 1 = 115 bytes
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