Table $2\mathrm{.}19$ Data for a Sample of $100$ Credit Card Purchases at Pelican Stores

$\backslash$table$[[$Customer$,$Type of Customer,Items,Net Sales,Method of Payment,Gender,$\backslash$table$[[$Marital$],[$Status$]],$Age$],[1,$Regular,$1,39\mathrm{.}50,$Discover,Male,Married,$32],[2,$Promotional,$1,102\mathrm{.}40,$Proprietary Card,Female,Married,$36],[3,$Regular,$1,22\mathrm{.}50,$Proprietary Card,Female,Married,$32],[4,$Promotional,$5,100\mathrm{.}40,$Proprietary Card,Female,Married,$28],[5,$Regular,$2,54\mathrm{.}00,$MasterCard,Female,Married,$34],[.,.,,.,,,,],[*,,,,,,,],[96,$Regular,$1,39\mathrm{.}50,$MasterCard,Female,Married,$44],[97,$Promotional,$9,253\mathrm{.}00,$Proprietary Card,Female,Married,$30],[98,$Promotional,$10,287\mathrm{.}59,$Proprietary Card,Female,Married,$52],[99,$Promotional,$2,47\mathrm{.}60,$Proprietary Card,Female,Married,$30],[100,$Promotional,$1,28\mathrm{.}44,$Proprietary Card,Female,Married,$44]]$

$1)$ what is the percentage of promotional customers?

$2)$ how many customers are using MasterCard as a payment method?

$3)$ what is the number of regular customers who have net sales between $$25$ and $$50?$