nerf cheese prices, part 3: misc, last one (#38247)

Resources/Prototypes/Entities/Clothing/Masks/masks.yml

@@ -306,6 +306,8 @@
   - type: PhysicalComposition
     materialComposition:
       Plastic: 25
+  - type: StaticPrice
+    price: 5
 
 - type: entity
   parent: ClothingMaskBase

Resources/Prototypes/Entities/Objects/Devices/holoprojectors.yml

@@ -68,7 +68,7 @@
     tags:
       - HolofanProjector
   - type: StaticPrice
-    price: 80
+    price: 50
   - type: GuideHelp
     guides:
     - AtmosTools

Resources/Prototypes/Entities/Objects/Shields/shields.yml

@@ -547,4 +547,4 @@
                   min: 2
                   max: 2
     - type: StaticPrice
-      price: 250
+      price: 150