Manufacturing Costs Mr. Wareing To ask the Secretary of State for Trade and Industry what was the percentage increase in manufacturing costs in each of the years 1978 to 1991 inclusive. Mr. Leigh Changes in wages and salaries per unit of output in manufacturing, and in the costs of materials and fuel purchased by manufacturing industry, are shown in the table.------ | | ------ |1978| ------ |1979| ------ |1980| ------ |1981| ------ |1982| ------ |1983| ------ |1984| ------ |1985| ------ |1986| ------ |1987| ------ |1988| ------ |1989| ------ |1990| ------ |1991| ------