May someone please help explain what I'm doing wrong here? (my current work posted as well)

QUESTION 2. Use the Normal time given in the table below to reduce the project by 6 days. What is the added cost? Show the activity/activities that need to crash for each day. What activity to crash for the 1st day, what activity to crash for the 2nd day, and so forth. Time (days) Crash Activity Predecessor Normal none 6 Activity cost (S) Normal $10 $22 a 4 b a 3 C 4 $15 b b 5 5 3 5 e 2 4 f e 5 3 3 i 4 f f 3 J k I 8 Description Excavation, pour footers Lay foundation Frame and roof Sewer (floor) drains Install insulation Pour basement floor Install windows Rough electrical wiring Install furnace Exterior brickwork Install plasterboard Roof shingles Attach gutter Grading Lay subflooring Lay driveway Kitchen, sink, appliances Painting Finish wood floor 2 5 6 $21 $25 $12 $20 $20 $11 $16 $18 $23 $25 $12 $17 C,g i jik 1 Crash 20 28 22 25 30 18 22 20 23 28 26 29 31 16 22 30 28 24 34 8 m 10 n 4 O n q OOOW NW 000 m r CoE eo > 00 00 00 00 un $20 t V t $18 $15 $25 w 0 Path Day 1 Day 2 Day 3 Day 4 Day 5 Day 6 A-B-C-F-I-L-N-O-P-R = 57 57 57 57 57 b(1) 56 b(1) 55 62 60 A-B-C-F-J-M-Q-T-V - W = 63 t(1) t(1) 59 61 58 t(1) t(1) b(1) 57 b(1) t(1) 60 t(1) 59 b(1) 58 b(1) 57 A-B-C-K-M-Q-T- V - W = 63 t(1) 62 t(1) 61 A-B-E-G-K-M-Q-T- V - W = 66 t(1) 65 t(1) 64 t(1) 63 t(1) 62 b(1) 61 b(1) 60 Prc COST: 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 | 3 3 3 3 = 6 = 16 = 16 = 16 Tota Eac as