Question

what is the difference between net and gross pay

Answer 1

Net pay is the total amount left with the employ after all deductions.
Gross pay is the total pay without any deductions i.e. total amount earned by the employ.

Answer 2

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Gross Investment is referred to as the total expenditure that is made for buying capital goods over a time period, without accounting for depreciation.

Net Investment is the actual addition that is made to capital stock in a given period.