materials purchases budget & total cost

Dear Mr John.

Q1) Finished product :
Sales 7000 units, production units 7200 units

Materials:
usage per unit 3kg
opening stock 400kg, closing stock 500kg

materials purchase budget for the months ? my answer :21700kg ???

Q2) A company operates a job costing system. job number #007 required $45 of direct materials and $30 of direct labour. Direct labour is paid at the rate $7.50/hrs. production overhead are absorbed at the rate of $12.50 per direct labour hrs and non-production overhead are absorbed at rate of 60% of prime cost.

The total cost of job #007 is $170 ??

Q3)Salary cost /hrs for senior $40
Salary cost /hrs for junior $25
Overhead absorption rate per hour applied to all hours $20
Organisation adds 40% to total cost to arrive at the final fee to charged client.
Assignment ‘Project Runway’ took 54hrs of a senior time and 110 hours of junior time.
What is the final fee to charged for ‘project runway’ My answer is : $11466.?

Thanks