$($PLEASE NOTE FOR QUESTION $2$ IF YOU GET $855,660$ its wrong i can run it in the system and it says if it wrong or right

Antioch Extraction, which mines ore in Montana, uses a calendar year for both financial$-$reporting and tax purposes. The following selected costs were incurred in December, the low point of activity, when $1,550$ tons of ore were extracted:

Straight$-$line depreciation$ $36,500$Charitable contributions$*$Footnote asterisk$10,500$Mining labor$/$fringe benefits$294,500$Royalties$142,250$Trucking and hauling$295,410$

$*$Footnote asteriskIncurred only in December.

Peak activity of $2,850$ tons occurred in June, resulting in mining labor$/$fringe benefit costs of $$541,500,$ royalties of $$226,750,$ and trucking and hauling outlays of $$385,410.$ The trucking and hauling outlays exhibit the following behavior:

Less than $1,550$ tons$ $250,410$From $1,550$ to $2,049$ tons$295,410$From $2,050$ to $2,549$ tons$340,410$From $2,550$ to $3,049$ tons$385,410$

Antioch uses the high$-$low method to analyze costs.

Required:

$1.$ Classify the five costs listed in terms of their behavior: variable, step$-$variable, committed fixed, discretionary fixed, step$-$fixed, or semivariable.

$2.$ Calculate the total cost for next February when $1,850$ tons are expected to be extracted.

$3-$a$.$ Is hauling $1,550$ tons with respect to Antioch$$s trucking$/$hauling cost behavior cost$-$effective?

$3-$b$.$ If the company goal is $1,550$ tons, what is the maximum number of tons at which cost$-$effectiveness can be achieved?

$4.$ Distinguish between committed and discretionary fixed costs. If Antioch were to experience severe economic difficulties, which of the two types of fixed costs should management try to cut?