in acertain street of 200 houses 170 have electricity and 145 have glass doors. how many houses have both electricity and glass doors assuming that each has either a glass doors or electricity or both

2. using calculations based on a perpetual inventory system, determine the inventory balance altira would report in its august 31, 2021, balance sheet and the cost of goods sold it would report in its august 2021 income statement using the average cost method. (round "average cost per unit" to 2 decimal places.)