A variable cost is a constant amount per unit produced or used. Therefore, the total amount of the variable cost will change proportionately with volume or activity. Generally, a product's direct materials are a variable cost. To illustrate, let's assume that a bakery uses one pound of flour at a cost of $0.70 per pound for every loaf of bread it produces.
Most sports fields are one hectare in size. The Apple Bowl in Kelowna for instance is a 400 m running track and the grassy area inside is 1.12 hectares. The international rugby field pictured above is very close to one hectare in size, it is actually 1.0008 hectares. A perfect square is 100 meters by 100 meters is a hectare. An acre is about 0.4047 hectare and one hectare contains about 2.47 acres.
1 mile is 1,609 meters. 1 hectare is 2,472 acres. 1 hectare is also 10,000 sq meters (m2). 1 sq mile is then: 1,609m x 1,609m = 2,588,881 m2 2,588,881 m2 -----------------------= 258.88 hectares 10,000 m2 And in consequence: 258.88 hectares x 2.472 acres/hectare = 640 acres.