Which of the following managers is most likely to be responsible for an favourable labour efficiency variance?

A company is forecasting sales volume using time series analysis. The following equation has been derived from past data and is considered to be a reliable predictor of future sales volume:
y = 20,000+80x
Where y is the total sales units each quarter and x is the time period (the first quarter of year 1 is time period 1).

The following set of seasonal variations for each quarter has been calculated using the additive model.
What is the forecast sales units for the second quarter of year 3?

Which ONE of the following describes full cost-plus pricing?

A company makes a product using two materials, X and Y.
The standard materials required for one unit of the product are:

What is the materials yield variance?
Give your answer as a whole number.

A company makes Product A and Product B. The production process for both products uses one type of material, one type of labour, and utilises one machine. All three of these resources will be limited in November. The company has performed a linear programming model and the constraints and optimal solution, to maximise contribution, are as follows:
Constraints:

For November, which of the above constraints are binding, and which are non-binding?