(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
	March 31,

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

Net loss used for basic and diluted loss
per share:
Net loss attributable to Frontier common shareholders	$	(33)	$	(129)
Less: Dividends paid on unvested restricted stock awards		-		(1)
Total basic net loss
attributable to Frontier common shareholders	$	(33)	$	(130)
Effect of loss related to dilutive stock units		-		-
Total diluted net loss
attributable to Frontier common shareholders	$	(33)	$	(130)

Basic and diluted loss per share:
Total weighted average shares and unvested restricted stock
awards outstanding - basic and diluted		78,861		78,244
Less: Weighted average unvested restricted stock awards		(1,445)		(653)
Total weighted average shares outstanding - basic and diluted		77,416		77,591

Basic and diluted net loss per share
attributable to Frontier common shareholders	$	(0.44)	$	(1.67)

In calculating diluted net loss per common share for the three months ended March 31, 2018 and 2017, the effect of all common stock equivalents is excluded from the computation as the effect would be antidilutive.

Stock Options

For the three months ended March 31, 2018 and 2017, previously granted options to purchase 1,334 and 2,667 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 March 31, 2018 and 2017, we had 244,337 and 139,666 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 three months ended March 31, 2018 and 2017 because their inclusion would have an antidilutive effect. Compensation costs associated with the issuance of stock units were $0 and $(2) million for the three months ended March 31, 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 March 31, 2018 and 2017, as their impact was antidilutive.