Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_68994 ( "Material" text, "Resistivity (10 \u22126 ohm-inches)" real, "Relative permeability" real, "Skin depth, inches" real, "Surface resistance, Relative to copper" real )

### Question ###
What is the sum of skin depth with a resistivity of 1.12 and a relative permeability larger than 1?

### Accurate SQL ###

SELECT SUM("Skin depth, inches") FROM table_68994 WHERE "Resistivity (10 \u22126 ohm-inches)" = '1.12' AND "Relative permeability" > '1'