(12) Net Loss Per Share:

All share and per share amounts in the tables below have been retroactively adjusted for all periods presented to give effect to the reverse stock split. See Note 1 – Summary of Significant Accounting Policies for additional details.

The reconciliation of the net loss per share calculation is as follows:



	For the three months ended				For the six months ended
	June 30,				June 30,

($ in millions and shares in thousands, except per share amounts)	2018		2017		2018		2017

Net loss used for basic and diluted loss
per share:
Net loss attributable to Frontier common shareholders	$	(72)	$	(715)	$	(105)	$	(844)
Less: Dividends paid on unvested restricted stock awards		-		(1)		-		(2)
Total basic net loss
attributable to Frontier common shareholders	$	(72)	$	(716)	$	(105)	$	(846)
Effect of loss related to dilutive stock units		-		(2)		-		(2)
Total diluted net loss
attributable to Frontier common shareholders	$	(72)	$	(718)	$	(105)	$	(848)

Basic loss per share:
Total weighted average shares and unvested restricted stock
awards outstanding - basic		80,201		78,531		79,429		78,365
Less: Weighted average unvested restricted stock awards		(2,175)		(736)		(1,744)		(686)
Total weighted average shares outstanding - basic		78,026		77,795		77,685		77,679

Basic net loss per share
attributable to Frontier common shareholders	$	(0.92)	$	(9.20)	$	(1.35)	$	(10.88)

Diluted loss per share:
Total weighted average shares outstanding - basic		78,026		77,795		77,685		77,679
Effect of dilutive stock units		-		156		-		156
Total weighted average shares outstanding - diluted		78,026		77,951		77,685		77,835

Diluted net loss per share
attributable to Frontier common shareholders	$	(0.92)	$	(9.21)	$	(1.35)	$	(10.89)

In calculating diluted net loss per common share for the three and six months ended June 30, 2018, the effect of all common stock equivalents is excluded from the computation as the effect would be antidilutive.

Stock Options

For the three and six months ended June 30, 2018 and 2017, previously granted options to purchase 1,334 and 2,664 shares, issuable under employee compensation plans were excluded from the computation of diluted earnings (loss) per share (EPS) for those periods because the exercise prices were greater than the average market price of our common stock and, therefore, the effect would be antidilutive.

Stock Units

At June 30, 2018 and 2017, we had 247,634 and 155,616 stock units, respectively, issued under the Non-Employee Directors’ Deferred Fee Equity Plan (Deferred Fee Plan), the Non-Employee Directors’ Equity Incentive Plan (Directors’ Equity Plan), the 2013 Equity Incentive Plan and the 2017 Equity Incentive Plan. These securities have not been included in the diluted EPS calculation for the six months ended June 30, 2018 and 2017 because their inclusion would have an antidilutive effect. Compensation costs associated with the issuance of stock units were $0 and $(3) million for the six months ended June 30, 2018 and 2017, respectively.

Mandatory Convertible Preferred Stock

The impact of the common share equivalents associated with approximately 19,250,000 shares of Series A Preferred stock were not included in the diluted EPS calculation as of June 30, 2017, as their impact was antidilutive.