(b) B isi. where at a previous time before the particular time the taxpayer ceased to use the property in connection with a business or part of a business carried on by the taxpayer outside Canada and began to use it in connection with a business or part of a business carried on by the taxpayer in Canada, the amount by which the fair market value of the property at the previous time exceeded its cost to the taxpayer at the previous time, and
ii. in any other case, an amount equal to zero.