If the total amount appears star in print,it could be an issue in column's width,you can follow given steps:
Step 1:Go to The administration menu,
Step 2:Click configuration,
Step 3:Click invoice/Document printing,
Step 4:Click standard,
Step 5:Select sale invoice,
Step 6:In the Body column click self configured,here you can increase the width of Amount column according to the total width,total width should be 136 only.
Step 7:Now you can go the voucher and print invoice in standard format, it will be shown properly.