CREATE TABLE table_54106 ("End of Fiscal Year" FLOAT, "Gross Debt in $Billions undeflated Treas." FLOAT, "as % of GDP Low-High" TEXT, "Debt Held By Public  ( $Billions ) " FLOAT, "as % of GDP  ( Treas/MW ,  OMB or OMB/MW ) " FLOAT, "GDP $Billions OMB/BEA est.=MW.com" TEXT)

For End of Fiscal Year(s) with as % of GDP (Treas/MW, OMB or OMB/MW) of 28 and Gross Debt in $Billions undeflated Treas. smaller than 370.9 what would be the sum of Debt Held By Public ($Billions)?
SELECT COUNT("Debt Held By Public ($Billions)") FROM table_54106 WHERE "as % of GDP (Treas/MW, OMB or OMB/MW)" = '28' AND "Gross Debt in $Billions undeflated Treas." < '370.9'
SELECT COUNT("Debt Held By Public ($Billions)") FROM "table_54106" WHERE "Gross Debt in $Billions undeflated Treas." < '370.9' AND "as % of GDP (Treas/MW, OMB or OMB/MW)" = '28'