calculation assesment

perimeter-5.2m+5.2m+8.55+8.55=27.5
gross area of walls-5.2x2.4=12.48x2=24.96
-8.55x2.4=20.52x2=41.04 24.96+41.04=66
area of openings- window 1-1.3x1.6=2.08
-window 2-1.3x1.6=2.08
-window 3-1.2x1.1=1.32
-window 4-1.5x1.7=2.55
-door-2.1x0.9=1.89
=9.92
net area of wall-66m-9.92=56.08m2

coverage of the boards-56.08diveded by.160=350.5

meters required-350.5m

allow 7 % waste-350.5x1.07=375.035m

finding the cost- 7.25x375.035=$2719.00380




question 2-
perimeter-10.11+10.11+7.03+7.03=34.28m
6.76+676+1.88+1.88=17.28
34.28-17.28=17m2

gross area-7.03x2.4=16.872x2=33.744
10.11x2.4=24.264x2=48.528
33.744+48.528=87.272
area of openings-window1-1.35x1.5=2.025
window5-1.35x1.5=2.025
window2-1.2x1.8=2.16
window3-1.8x1.8=3.24
window4-1.8x1.2=2.16
window6-1.2x1.8=2.16
door-2.1x0.9=1.89
7%=66.612x1.75=71.612 total-15.66
net area 87.272-15.66=71.612
71.612x6.45=$461.90
how may sheets 2.7@1.2=3.24
71.612/3.24=23 sheets this based on a 2.4 sheets