(13) Net Loss Per Share:

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)	2019		2018

Net loss used for basic and diluted loss
per share:
Total basic net loss
attributable to Frontier common shareholders	$	(87)	$	(33)
Effect of loss related to dilutive stock units		-		-
Total diluted net loss
attributable to Frontier common shareholders	$	(87)	$	(33)

Basic loss per share:
Total weighted average shares and unvested restricted stock
awards outstanding - basic		105,426		78,861
Less: Weighted average unvested restricted stock awards		(1,541)		(1,445)
Total weighted average shares outstanding - basic		103,885		77,416

Basic net loss per share
attributable to Frontier common shareholders	$	(0.84)	$	(0.44)

Diluted loss per share:
Total weighted average shares outstanding - basic		103,885		77,416
Effect of dilutive stock units		-		-
Total weighted average shares outstanding - diluted		103,885		77,416

Diluted net loss per share
attributable to Frontier common shareholders	$	(0.84)	$	(0.44)

In calculating diluted net loss per common share for the three months ended March 31, 2019 and 2018, 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, 2019 and 2018, previously granted options to purchase 1,334 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, 2019 and 2018, we had 485,687 and 244,337 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, 2019 and 2018 because their inclusion would have an antidilutive effect. Compensation costs associated with the issuance of stock units were $0 million for each of the three months ended March 31, 2019 and 2018.

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, as their impact was antidilutive.