Please, this is the quotation i got for the consruction of a decking of a three bed-room Apartment (single).in a location in BENIN- CITY.please can any proffessional in the house help me glance into the below quotations,before i get frustrated out.

REINFORCEMENT
BEAN:
33 length of Y16 @ N2,800 = N92,400
18 length of Y12 @ N1,650 = N29,700
50 length of Y10 @ N1,200 = N60,000
SLAB
255 length of Y12 @ N1,650 = N420, 750
2 25kg Binding wire @ N6,000 = N12,000
Labour = N50,000
TOTAL =N664,850

CONCRETE WORK
1 trip of trailer load = N160,000
2 trips of sharp sand @ N13,000 = N26,000
150 bags of cement @ N2,000 = N300,000
Mixer = N10,000
Vibrator = N12,000
Water provisional sum =N
Labour for casting = N70,000
TOTAL = N578,000
ELECTRICAL WORK
4 Bundles of 20mm dignity pipes @ N3,000 = N12,000
3 packets of coupler @ N800 = N2,400
3 packets of 4way junction box @ N700 = N2,100
1 cup of Abro gum = N1,000
Labour = N20,000
TOTAL = N37,500
FORMWORK
140 length of 1x12x12 @ N1150 = N161,000
45 length of 2x3 @ N550 = N24,750
Transport, loading and offloading of wood = N5,000
100 length of bamboo @ N120 = N12,000
Transport, loading and offloading of bamboo = N4,000
4 length of Plywood @ N1,200 = N4,800
1 bags of 3inches nail @ N5,000 = N5,000
1 bags of 4inches nail @ N5,000 = N5,000
10 kilos of 2inches nail @ N150 = N1,500
Labour/carpenter = N
TOTAL = N223,050

MECHANICAL WORK
15 4” p.v.c. niger pipe @ N850 = N12, 750
15 1half”niger p.v.c pipe @ N600 = N9,000
23 4” p.v.c bend tiger ring @ N500 =N11,500
10 4” tee p.v.c. tigre ring @ N450 = N4,500
35 1half” p.v.c. bend @ N250 = N8,750
25 1half” tee p.v.c @ N300 = N7,500
12 1half” 4way tee pvc @ N500 = N6,000
15 1half” 45* bend @ N300 = N4,500
3 biggest cup of gum @ N1,600 = N4,800
20 1half” cap plug @ N50 = N1,000
10 4” cap plug @ N60 = N600
Labour =N20,000
TOTAL = N90,900
REINFORCEMENT
BEAN:
33 length of Y16 @ N2,800 = N92,400
18 length of Y12 @ N1,650 = N29,700
50 length of Y10 @ N1,200 = N60,000
SLAB
255 length of Y12 @ N1,650 = N420, 750
2 25kg Binding wire @ N6,000= N12,000
Labour = N50,000
TOTAL =N664,850
CONCRETE WORK
1 trip of trailer load = N160,000
2 trips of sharp sand @ N13,000 = N26,000
150 bags of cement @ N2,000 = N300,000
Mixer = N10,000
Vibrator = N12,000
Water provisional sum =N
Labour for casting = N70,000
TOTAL = N578,000
ELECTRICAL WORK
4 Bundles of 20mm dignity pipes @ N3,000 = N12,000
3 packets of coupler @ N800 = N2,400
3 packets of 4way junction box @ N700 = N2,100
1 cup of Abro gum = N1,000
Labour = N20,000
TOTAL = N37,500
FORMWORK
140 length of 1x12x12 @ N1150 = N161,000
45 length of 2x3 @ N550 = N24,750
Transport, loading and offloading of wood = N5,000
100 length of bamboo @ N120 = N12,000
Transport, loading and offloading of bamboo = N4,000
4 length of Plywood @ N1,200 = N4,800
1 bags of 3inches nail @ N5,000 = N5,000
1 bags of 4inches nail @ N5,000 = N5,000
10 kilos of 2inches nail @ N150 = N1,500
Labour/carpenter = N
TOTAL = N223,050

MECHANICAL WORK
15 4” p.v.c. niger pipe @ N850 = N12, 750
15 1half”niger p.v.c pipe @ N600 = N9,000
23 4” p.v.c bend tiger ring @ N500 =N11,500
10 4” tee p.v.c. tigre ring @ N450 = N4,500
35 1half” p.v.c. bend @ N250 = N8,750
25 1half” tee p.v.c @ N300 = N7,500
12 1half” 4way tee pvc @ N500 = N6,000
15 1half” 45* bend @ N300 = N4,500
3 biggest cup of gum @ N1,600 = N4,800
20 1half” cap plug @ N50 = N1,000
10 4” cap plug @ N60 = N600
Labour =N20,000
TOTAL = N90,900