aku kira simple2 ok..
upgrade.. 90.. ok upgrade ni kita letak tepi dulu..
kita kira yang rental ja dulu..
rentel 21x6 ..72usd
4x30 =120 yang lebih kita ambik la 140...
rentel 21 usd tu untuk sebulan jerk ek...ke berapa hari rm21usd ni..
agak pening nak faham soalan bro..
tapi teman nak bro faham sistem sewaan dia.. cuba tafsir data yang teman rekod dulu2:
BASE ON TABLE OF RENTING:
INI UNTUK SEWAAN:
11.12.2011 @ 11.27pm Rented 100 Referrals (RATE: $0.20/Ref) [Cost: $20.00] Total Ref:100
19.12.2011 @ 06.49am Rented 100 Referrals (RATE: $0.20/Ref) [Cost: $20.00] Total Ref:200
27.12.2011 @ 08.00am Rented 100 Referrals (RATE: $0.20/Ref) [Cost: $20.00] Total Ref:300
07.01.2012 @ 05.03pm Rented 050 Referrals (RATE: $0.21/Ref) [Cost: $10.50] Total Ref:350
16.01.2012 @ 06.05pm Rented 150 Referrals (RATE: $0.21/Ref) [Cost: $31.50] Total Ref:500
21.01.2012 @ 06.00pm Rented 100 Referrals (RATE: $0.21/Ref) [Cost: $21.00] Total Ref:600
25.01.2012 @ 07.00pm Rented 200 Referrals (RATE: $0.22/Ref) [Cost: $44.00] Total Ref:800
29.01.2012 @ 07.00pm Rented 200 Referrals (RATE: $0.23/Ref) [Cost: $46.00] Total Ref:1000
02.02.2012 @ 07.00pm Rented 200 Referrals (RATE: $0.23/Ref) [Cost: $46.00] Total Ref:1200
INI UNTUK ENTEND:
06.01.2012 Extended 100 Referrals (RATE: $0.20/Ref) [Cost: $20.00]
12.01.2012 Extended 100 Referrals (RATE: $0.20/Ref) [Cost: $20.00]
20.01.2012 Extended 100 Referrals (RATE: $0.20/Ref) [Cost: $20.00]
01.02.2012 Extended 133 Referrals (RATE: $0.20/Ref) [Cost: $26.60]
18.02.2012 Extended 174 Referrals (RATE: $0.21/Ref) [Cost: $36.54]
18.02.2012 Extended 175 Referrals (RATE: $0.22/Ref) [Cost: $38.50]
19.02.2012 Extended 502 Referrals (RATE: $0.23/Ref) [Cost: $115.46]
27.02.2012 Extended 557 Referrals (RATE: $0.23/Ref) [Cost: $128.11]
dari contoh ni boleh buat anggaran??
perhatikan pada tarikh, dan jumlah referral yang teman ada..